Kelly Osbourne's mother Sharon taught her to be a "fighter".
The 'Fashion Police' co-host admits her mum, who underwent surgery for colon cancer in 2002 and had a double mastectomy in 2012, is her biggest inspiration because she's shown her how to make the most out of life and appreciate every single day.
Speaking to BWatt magazine, she explained: " She taught me to be a fighter, that a smile can be the best medicine, to live every day as if it's your last, that family is all that really matters, and that love is the only true thing that lasts forever."
However, the 29-year-old star - who has battled an addiction to pain killers in the past - admits she hasn't always had a positive outlook on life and would often wonder why her family were be thrown so many obstacles their way until she realised life is full of challenges.
She explained: "For so long I sat back and said to myself 'why me?' Why did I almost kill myself with drugs? Why did my mum almost die from cancer? Why did my dad [Ozzy Osbourne] get into a motorcycle accident that almost killed him? Why does my brother [Jack] have Multiple Sclerosis, a disease of which there is no cure?
"Then I sat back and really thought about my life and I realised that this is just life. I would be an ignorant brat to think I was the only person in the world facing challenges like this."

Neon Jungle hate it when boys play hard to get.
The 'Louder' band, who get plenty of attention from the opposite sex, still have "grumbles" about boys just like other young girls who aren't famous.
Speaking at the Blinkbox Music UK Live festival in Sunderland on Saturday (21.06.14), band member Asami Zdrenka said: "I've got a good grumble about boys. Why do boys text you and seem interested, stop texting you and then suddenly reappear seeming interested again and then do the same thing over and over..?"
Bandmate Jessica Plummer is equally as confused by men and said: "I hate it when they play the crazy card. Call me a b**ch before you call me crazy. That is like the most annoying thing in the whole world, I don't like it."
Meanwhile, the band, also made up of Shereen Cutkelvin and Amira McCarthy, have just released their new single Louder and pleased with the song.
Jessica said: "I love it when the last chorus kicks in and the crowd are going, "Grrr rock on" and I didn't even know this was a rock song! It's like [we become] Eminem, you know the rapper."
Taking about their plans to break America, Jess also said: "Our EP came out a few days ago and we recently got signed and we will be releasing an American album soon.
"It's very versatile, there are tracks that are very different from each other, and you will see different sides of all of us and Neon Jungle as a band."
Upcoming dates for Blinkbox Music UK Live are Saturday, June 28 in Ipswich at Chantry Park and Sunday, June 29 on Weston-super-Mare beach.

Kourtney Kardashian tried to teach boyfriend Scott Disick a lesson by not letting him attend North West's birthday.
The 'Keeping Up with the Kardashians' star flew from The Hamptons, where she is filming the E! spin-off show, to their home in Calabasas, California to host her niece's first birthday party with sister Kim Kardashian West.
A source told TMZ Kourtney decided not to let Scott attend but her actions backfired when he opted to stay in Southampton, New York to enjoy a belated birthday celebration for himself on Saturday (20.06.14), after turning 31 on May 26.
TMZ reports: "Disick didn't stew over the snub - he had a belated birthday party at 1Oak [club] in The Hamptons where he sprayed champagne on fellow party-goers."
The source claims Kourtney believed Scott would "feel the burn" for being left out because North's party was thrown in their backyard.
They added: "The tension revolves around Scott's propensity for partying and leaving the family in the dust.
"Kourtney gave Scott's plane ticket to a nanny ... again, a not-so-subtle insult that seemed lost on Scott."
Scott, who has children, Mason, four, and Penelope, 23 months, with pregnant Kourtney, reportedly arrived at 10ak in his Bentley with a huge entourage in tow shortly after midnight and wasted no time letting his hair down.
Party-goers claim he was "pretty wasted" and didn't seem to mind being away from his girlfriend.
Meanwhile, North and her parents, Kanye West and Kim, were joined by a number of famous pals, including Ciara and her one-month-old son, Future, and fashion designer Rachel Roy, at a Coachella-inspired 'Kidchella' party at Kourtney and Scott's $8.45 million mansion, which they purchased earlier this year.
The couple spared no expense for the celebration, which took place almost one week after North's actual birthday last Sunday (15.06.14).

Laura Prepon thinks Mila Kunis and Ashton Kutcher will be "wonderful" parents.
The 'Orange is the New Black' actress is delighted her former 'That '70s Show' co-stars are expecting their first child together and thinks their baby is very lucky to have them as mother and father.
She told E! News: "They're going to be wonderful parents. I don't comment on my friends' private lives, but they're wonderful."
Mila, 30, recently admitted she loves being pregnant - because her breasts have grown.
She said: "They're amazing! They've tripled in size. I was a 34A; now I'm a 36C. I'm so excited! I'm telling everyone I know, 'Go ahead, touch them!'
"Without being an a*shole, I have to say, I love being pregnant."
The brunette beauty - who got engaged to Ashton earlier this year - also admitted she has warned her fiance to stay "above the action" in the delivery room.
She said: "Two people are allowed in my delivery room: my doctor and my significant other. And [my future husband] is staying above the action. He'll be head to head. Not head to vag. Unless he wants to risk his life and see. But I wouldn't if I were him.
"I highly doubt he wants to see that being ripped apart and shredded. Because it will be shredded. It's just a matter of how badly."

Justin Bieber and Selena Gomez enjoyed a double date with his grandparents on Sunday (22.06.14).
The on/off couple, who recently reunited, were joined by the 'Confident' singer's maternal grandparents Bruce and Diane Dale during a trip to Los Angeles Zoo.
According to HollywoodLIfe.com, Justin, 20, "stayed close by Selena's side" as they took in the sights, including a peacock which the singer appeared to take issue with.
Posting a snap of the colourful feathered bird on his Instagram account, Justin quipped: "Hey u quit lookin at me like that (sic)"
It seems the A-list stars, who were on their third date in the space of a week, had their own police escort to help them navigate around the spacious zoo without being mobbed by fans.
David Osokow, director of client relations at SBE entertainment group, posted a picture of Justin, Selena, 21, and a Lieutenant Beccera on his Instagram account, thanking the police official for his "looking after us".
The couple's Sunday zoo date comes just two days after Justin and Selena enjoyed a romantic meal for two at Mastro's steakhouse in Beverly Hills, California, on Friday (20.06.14). The stars later checked out new movie 'Think Like a Man Too' at a local cinema.
Meanwhile, Justin and his on/off girlfriend appeared "smitten" at a bible study class at City Church in Los Angeles last Wednesday (18.06.14).

Uri Geller hypnotised Michael Jackson to quiz him about child abuse allegations.
The celebrity illusionist and self-proclaimed psychic claims he put the late King of Pop under a hypnotic spell in order to determine if he was really innocent of abusing young boys - which was the basis of a much-publicised 2005 trial - and is certain his pal was not guilty.
He said: "Michael was, and is, totally innocent - that was proven in court. Not only that, I know he's innocent because I hypnotised him and asked him those questions."
Uri, 67, admits he is "haunted" by guilt for introducing Michael to journalist Martin Bashir, who produced a compromising TV documentary on the star in which he was seen holding hands with Gavin Arvizo, then 13.
The unflattering interview was one of the incidents that led to the 2005 allegations and subsequent trial and caused a rift between the pals.
Uri said: "It all happened because of that Martin Bashir interview. Looking back, that was a devastating mistake. Martin Bashir showed me a letter Princess Diana had written to him and I thought because Michael loved Diana, Martin was the right person to do the interview.
"The interview would have been amazing if Michael hadn't sat there with a 13-year-old boy holding his hand, telling the world that it's OK to invite them round and give them warm milk. That wasn't right.
"But the fact that I was the instigator of the documentary that began his downfall caused the rift and we never spoke again. That guilty feeling will never leave me."
Uri also opened up about Michael's tragic death in June 2009 - from a lethal dose of Propofol - claiming he often warned the 'Thriller' star over his reliance on prescription medicine.
He told Britain's HELLO! magazine: "I warned Michael many times. I shouted at him, I slept on the floor of the hotel room next to his bed to make sure he woke up in the morning, and to make sure no one came into the room. I warned him not to take anything."

Example is in talks to collaborate with Sir Elton John.
The 'Kickstarts' himaker, who has cemented his transition from rapping to singing with his fifth album 'Live Life Living' wants to team with the 'Rocket Man' star to work on a new track together.
Speaking to DJ Neev at the KISS FM UK secret gig in London, Example said: "I've recently collaborated with The Klaxons, Wretch 32, Sigma and Angel Haze and I'm chatting to Elton John about a potential collaboration.
"I'm too busy to think about who I could work with, people just get in touch and I do it if I find them interesting".
The singer, real name Elliot Gleave, has been touring constantly and visited 42 countries in the past two years.
And he insists seeing the world through his music is "the most beautiful thing."
He said: "Growing up in the 90s and 00s you hear about all of these countries, perhaps because there is a war on and you see it in the news.
"Then you perform in Latvia or something and the people are wicked, you really build a picture of what the place is like."
Meanwhile, the star also slammed rapper Pitbull for tweeting a sarcastic photograph mocking him.
He said: "I don't know what Pitbull stands for, I wouldn't say he's a threat to anyone other than a threat to fashion. "I can't stand it..what he represents. He is dressing like he's in Miami, but there is no place in the world for those white trousers."

Prince decided not to headline Glastonbury festival after becoming upset over "social media rumours".
The 'Raspberry Beret' hitmaker, who is still rumoured to be making a surprise appearance at the event later this week, was discussing a headline slot with organiser Michael Eavis, but became irritated by reports he would be playing and decided not to perform, making way for Metallica.
Michael told The Guardian newspaper: "We wanted him to play, and it got to the point where his people were talking to us about him doing it, but before he confirmed he got really upset because he thought we had advertised that he was playing. We hadn't, but with social media, rumours get everywhere, and one of those rumours was that Prince was coming. So he didn't want to do it in the end."
Michael insists the "social media chit-chat" about who might be playing the Worthy Farm event makes no difference to the ticket sales because they sell out in October, before the headline acts are even announced.
Meanwhile, reports suggest Prince still wants to perform on a smaller stage at the Somerset event, also being headlined by Kasabian and Arcade Fire.
A source told The Sun newspaper: "Prince wants to show up somewhere as a surprise. He has spent so much time in the UK lately, he'd love to do an impromptu set."

Gordon Ramsay has ended his hit show 'Kitchen Nightmares' after a decade.
The foul-mouthed chef has decided to call it a day on the popular programme, which sees him attempt to spruce up failing restaurants, following a "phenomenal 10 years making 123 episodes, 12 seasons, shot across two continents".
'Kitchen Nightmares' has aired on Channel 4 since 2004 and also has a hugely popular US spin-off.
In a statement on his official website, Gordon wrote: "As filming comes to a close on the latest series of 'Kitchen Nightmares' I've decided to stop making the show. I'm currently filming four new episodes, 'Costa Del Nightmares', for Channel 4 which will be my last."
The 47-year-old culinary expert hailed the programme as an "amazing journey" and thanked viewers for supporting him.
He added: "I'm glad I've been able to entertain and hopefully help a few people along the way. It's sad to say goodbye to 'Kitchen Nightmares' but I'll be continuing with my other shows. It's been memorable! Thank you for watching."
Gordon's decision to end the hit show comes just months after it was claimed he plans to leave Channel 4 when his contract expires later this year and sign with ITV.
A source previously said: "It would be a massive coup for ITV and execs are really excited about the prospect of landing him. Talks have been going really well.
"Gordon doesn't think Channel 4 is the right fit for him any more and has been gradually winding down his work with them over the last 12 months.
"He wants to come back with a bang - and ITV is the place to do it."

Luisa Zissman and Blue are to star in a new reality show.
The 'Celebrity Big Brother' star and the 'All Rise' boy band are teaming up to open a new bar in Ibiza, with the show - set to air on new ITV digital channel, ITVBe - chronicling their efforts.
Blue - consisting of Lee Ryan, Duncan James, Antony Costa and Simon Webbe - are to run the bar, while bakery owner and former 'Apprentice' contestant Luisa will be in charge of keeping the boys in line.
A source told The Sun newspaper: "Luisa won't let the boys rest on their laurels. Everyone saw her wild side on 'Celebrity Big Brother' and the bosses are hoping that side will come out in Ibiza. It could get very, very messy."
Luisa, 27, and Lee, 31, took part in the latest series of 'Celebrity Big Brother' in January, which was a huge hit in the ratings for Channel 5. ITV bosses will hope to emulate their success with the new show.
ITVBe will launch later this year and is expected to be the new home of 'The Only Way is Essex' and other reality shows.
ITV boss Peter Fincham previously said: "Expanding ITV's family of channels to introduce a new free-to-air, female skewing channel focusing on entertainment and reality means our viewers will have access to even more great content. We identified an opportunity to develop what is currently part of the ITV2 schedule - reality and non-scripted shows, which are very popular with young women and housewives with kids - into a distinct channel proposition, aimed more squarely at that audience."

Karen Gillan wants to play Spider-Girl.
The former 'Doctor Who' actress has expressed an interest in portraying a "lady version" of Spider-Man and after learning about both May 'Mayday' Parker aka Spider-Girl, and Julia Carpenter, the alter ego of Spider-Woman she made a quick decision over the role she'd prefer.
Asked which superhero she'd like to play, she told SFX: "Yeah, who is there...? I want to play a version of Spider-Man that's a lady.
Spider-Woman - does she exist? I want to play Spider-Girl!"
The 26-year-old beauty recently admitted she found it "scary" when she first saw herself as Nebula in 'Guardians of the Galaxy' with her shaved head, black face-piece and purple face paint.
She said: "I couldn't believe it. I was like 'woah'. I'd seen mock up pictures and they'd done make-up tests on other people, so I had an idea. But, when I saw it on myself it was really scary."
The make-up and costume helped Gillan get into character since she didn't feel like she was herself.
She added: "It did half the job for me. I mean, having shaved my head and working out so much, I just felt like a different person so that really helped with the performance."
She will star alongside Chris Pratt who will play the lead role of Peter Quill - otherwise known as the Star-Lord.

Mark Wahlberg was more scared on the set of 'Transformers: Age of Extinction' than he had been for any other movie.
The 43-year-old actor has revealed he was terrified while shooting certain scenes on the Hong Kong set of the upcoming fourth film in the series - which follows on from the previous trilogy starring Shia LaBeouf - in which he plays car mechanic Cade Yeager.
Quizzed on whether there was one particular day of filming that was really crazy, he told Collider: "It got crazy everyday.
"I would say the scene where T.J. Miller's character [Lucas] ... when we're running from that major explosion. That was pretty serious.
"Those guys were setting it up for days before we even got there. It was like, 'Don't blink, don't flinch, do not ruin this shot'.
"And of course running across that building in Hong Kong, that was the most scared I've ever been on a movie."
Meanwhile, the 'Lone Survivor' actor has also confessed that the script for the upcoming 'Ted' sequel 'Ted 2' made him laugh more than the original.
When asked how he was feeling about reprising his role as layabout John Bennett, he said: "I can't wait. I start shooting in thirty days and im just itching to get back to Boston and get back into it.
Quizzed on whether the script was funny, he added: "Of course, yeah, absolutely. Better than the first one."