Josh Groban feels "very lucky" to be dating Kat Dennings.
The 'Brave' hitmaker was very nervous before singing in front of the '2 Broke Girls' actress for the first time at the Carousel of Hope Ball in Beverly Hills, Los Angeles on Saturday (11.10.14), where the duo made their first official outing as a couple.
Speaking before the event, the 33-year-old star told 'Entertainment Tonight': "I do have such a lovely date tonight. I'm very lucky my girlfriend has joined me tonight. It's her first time hearing me sing, so I'm going to do some extra warm-ups so I don't suck."
Prior to dating Josh, the 28-year-old beauty was in a relationship with Nick Zano, who she co-starred alongside on the American sitcom for two seasons.
Josh has previously dated January Jones and also been romantically linked to Katy Perry in the past.
The hunk recently admitted he quite enjoyed being single but sometimes found life a little bit lonely without a lover by his side.
He said last year: "I am single and I do enjoy it. I enjoy being in a relationship too, though.
"I like the saying, 'A good relationship is a friendship on fire.' It's nice to have a companion - especially when you're a solo artist, as it can be very lonely."

Jason Derulo insists his split from Jordin Sparks is permanent.
The 'Talk Dirty' hitmaker, who recently ended his relationship with the 'No Air' singer after three years of dating, has ruled out getting back together with the 24-year-old beauty in the future.
Asked if there is any chance of a reconciliation, the 25-year-old star said: "Oh boy. Nah, it's not a pause."
Jason says he is "doing good" and is ready for "new chapters in life."
He added: "This chapter is beginning awesome.
"It's been one heck of a ride, but a good one."
But the R&B heartthrob admits his split from Jordin has been "difficult."
He told E! News: "It's definitely a difficult thing. But you know, but I wasn't really thinking about myself, I was more thinking about how she was coping with it on the inside."
He added: "You go through things in life and you take it with a grain of salt. You keep moving."
The 'Marry Me' hitmaker claims he has already received a few private messages on Twitter from other celebrities, asking him out on dates.
He said: "I guess it's only natural right. If you have something in the back of your mind and you're like, 'It probably can't happen, it can't happen,' and then it finally can, you're like, 'Oh well.. [I'll send a message]' "

Kesha is being countersued by her record company boss, Dr. Luke.
The 41-year-old music producer, who runs Kemosabe Records, claims the 27-year-old 'Tik Tok' singer is a liar and is trying to extort him after she accused him of sexually, physically and emotionally her for 10 years and forcing her to use drugs and alcohol.
In his lawsuit, filed just hours after the blonde beauty filed her own lawsuit, the music producer - real name Lukasz Gottwald - says her claims are lies being engineered by her mother, Pebe Sebert, and Kesha's new management firm, according to gossip website TMZ.com.
He also claims he's had a copy of a draft of Kesha's lawsuit for months and says she tried to extort him by threatening to file it and spread lies about him to a blogger who started a 'Free Kesha' website unless he released her from her recording contract.
In a statement, his lawyer, Christine Lepera, also said Kesha's claims are "scurrilous" and "false," and part of "a campaign of publishing outrageous and untrue statements."
She added: "Undoubtedly, Kesha's lawsuit is nothing more than a continuation of her bad and offensive acts."
The 'Blow' hitmaker, who sought treatment in rehab for an eating disorder earlier this year, has collaborated with Dr. Luke on a number of her hits, including 'Die Young'.
He has also produced songs for Kelly Clarkson, Britney Spears, Katy Perry and One Direction.

Christina Aguilera will return to 'The Voice' USA next year.
The 'Your Body' hitmaker, who previously shared a rotating spot on the judging panel with Shakira, has been replaced by Gwen Stefani this season as she is taking some time off after welcoming her daughter, Summer Rain Rutler, into the world in August, but has already signed on to appear on the next series alongside Adam Levine, Pharrell and Blake Shelton.
Producers confirmed the 33-year-old singer is officially returning to the NBC musical competition for season eight via Twitter today (14.10.14), writing: "OFFICIAL ANNOUNCEMENT: Say HELLO to your Season 8 coaches! @adamlevine @Pharrell @xtina @blakeshelton #TheVoice."
A source recently claimed Christina was upset about Gwen filling in for her and was concerned she wouldn't be asked to return to the show.
The insider said: "Christina is extremely threatened by [her temporary replacement] Gwen. She knows that if the ratings are higher on Gwen's season than they were on hers, the producers may have no choice but to ask Gwen to stay on. Christina's in a world of paranoid right now."
But the blonde beauty previously insisted she was very excited about Gwen, 45, joining the show after she accidentally leaked the information in April.
She tweeted at the time: "So excited to have you join #TheVoice squad @GwenStefani! Welcome to our crazy fan! Kisses- xoxo #blondesdoitbest [sic]."

Kesha is suing Dr. Luke for allegedly abusing her for almost 10 years.
The 'Tik Tok' hitmaker, who sought treatment in rehab for an eating disorder earlier this year, has filed a lawsuit against her record company boss and music producer - real name Lukasz Gottwald - claiming he began abusing her sexually, physically, verbally and emotionally shortly after she signed a contract with him when she was 18.
In court documents, obtained by gossip website TMZ.com, the 27-year-old singer, who is signed to Dr. Luke's record label Kemosabe Records, alleges he made repeated sexual advances toward her and forced her to use drugs and alcohol.
She claims he once forced her to snort an unknown substance before they boarded a flight together and says he forced himself on her while she was under the influence of the drug, and also alleges he once attacked her at his house in Malibu, California, where he was "violently thrashing his arms at her."
On another occasion, the blonde beauty claims she suffered memory loss after Dr. Luke, 41, gave her "sober pills" after forcing her to drink alcohol with him.
Kesha blames the music producer, who has also worked with Katy Perry, Pink and Kelly Clarkson, for her body image issues, claiming he once said to her: "You are not that pretty, you are not that talented, you are just lucky to have me."
The 'Blow' singer is asking a judge to release her from her contract with Luke.
Her lawyer, Mark Geragos, said: "This lawsuit is a wholehearted effort by Kesha to regain control of her music career and her personal freedom after suffering for ten years as a victim of mental manipulation, emotional abuse and an instance of sexual assault at the hands of Dr. Luke."
He added: "The facts presented in our lawsuit paint a picture of a man who is controlling and willing to commit horrible acts of abuse in an attempt to intimidate an impressionable, talented, young female artist into submission for his personal gain. Kesha is focused on moving her life and her career beyond this terrible time."
Dr. Luke has yet to comment on the allegations.

Amanda Bynes reportedly feels utterly betrayed by her parents.
The 28-year-old actress, who was recently arrested for driving under the influence [DUI] and accused of shoplifting, was involuntarily committed to a psychiatric hospital in Pasadena, California on Friday (10.10.14) after her parents, Rick and Lynn Bynes, secretly arranged for a car service to bring her there from Los Angeles International Airport.
A source told gossip website TMZ.com that the 'Easy A' star says her relationship with her parents has been "destroyed forever" and she is furious with them for tricking her into seeking treatment.
Amanda's parents are expected to ask a judge to give Lynn legal control to make decisions for the troubled actress via another conservatorship before her involuntary hold comes to an end in two weeks time.
Sources believe it will be extremely difficult to manage Amanda given how angry she is with them.
But Rick and Lynn are relieved they managed to pull off the plan and are glad their daughter is "safe" and can now get the "help" she needs in hospital.
A source said previously: "They're happy she's safe and that Amanda is finally getting some help."
Amanda, who is believed to have been diagnosed with Bipolar and Schizophrenia, spent five months in a treatment facility in July 2013 when she was placed under involuntary psychiatric hold after she was arrested for starting a fire in a stranger's driveway.
She was released in December and appeared to be getting her life back on track until her conservatorship came to an end last month.

Kanye West allegedly thinks Scott Disick is "toxic" for Kourtney Kardashian.
The 'New Slaves' rapper is reportedly very concerned about his pregnant sister-in-law, as he thinks her long-term boyfriend, who was hospitalised for alcohol poisoning earlier this year, is "a hot, toxic, mess" and is partying "like the world is going to end."
A source close to the 37-year-old star, who has 15-month-old daughter North with wife Kim Kardashian West, 33, told HollywoodLife.com: "Kanye would never leave Kim when she was pregnant, unless it was to bring money back home to the family.
"Big money. He didn't leave Kim alone when she was pregnant unless he was clocking six figures."
The insider said the protective star doesn't understand why Scott, who already has son Mason, four, and daughter Penelope, two, with Kourtney, wants to party without his girlfriend, 35, as his philosophy is "when your girl is pregnant, guess what -- you're pregnant, too."
'Keeping Up with the Kardashians' beauty Kourtney recently told Scott, 31, on the show that she wanted him to sober up or leave.
She said: "Unless you want to be sober, then I don't want you here.
"If you want to die then you can continue to act this way."
Scott has been struggling since the tragic deaths of his mother, Bonnie, last October and father Jeffrey less than three months later in early January.

Bill Murray says wanting an Oscar feels "like a virus."
The 64-year-old star admits he "had been infected" by Oscar fever in 2004 when he convinced himself that he was going to win the Best Actor trophy for 'Lost in Translation' before he losing out to 'Mystic River' star Sean Penn, and now believes winning the prestigious accolade can ruin acting careers.
Asked if he plans to campaign for his new Harvey Weinstein-produced movie, 'St Vincent,' ahead of next year's ceremony, the 64-year-old actor told Variety magazine: "I've never done that. I know that's something Harvey does -- he forces you to do these things. I'm not that way. If you want an award so much, it's like a virus. It's an illness."
But Bill also believes Oscars often put too much pressure on the winners after all the excitement has died down.
He said: "People have this post-Oscar blowback. They starting thinking, 'I can't do a movie unless it's Oscar-worthy.' It just seems people have difficulty making the right choices after that."
The actor claims he is "normal" and insists fame hasn't changed him.
He said: "I was kind of formed early on. People go, 'Oh you act like that because you're a big shot.' No, I always acted like a jerk. I came from a big family."
The 'Monuments Men' star doesn't have a manager or an agent, and only recently got a smart phone so he can communicate with his six sons, Homer, Luke, Cal, Jackson, Lincoln and Cooper, ages 13 to 32.
He said: "I got it to communicate with my sons, because they will not answer a phone call, but they will answer a text."

Gwyneth Paltrow's psychic believes the actress will marry again.
The 'Iron Man 3' star - who split from husband Chris Martin earlier this year after 11 years of marriage - has been having sessions with Hollywood medium Jill Willard, who has reassured her she has a happy future ahead.
Jill, who prefers to be known as an 'intuitive', said: "Gwyneth is an amazing woman and I see great things in her future. She will remarry and find love as she is open to it."
Gwyneth's sessions with Jill have allowed her to "unlock" some feelings within herself so she is able to move on from her break-up.
Jill added to Grazia magazine: "When someone splits from a partner I'm usually able to show them why they broke up
"I will see things and tap into deeper thoughts and emotions. I'm able to decipher why things have happened and lessen their fears.
"My information empowers clients to move forward and then go out and find more support - divorce coaches, therapists etc.
"I helped Gwyneth to unlock a few things for her, then to seek help from other experts."

Cheryl Fernandez-Versini has been giving Kimberley Walsh baby tips.
The 'X Factor' judge has been supporting her former Girls Aloud bandmate since she gave birth to son Bobby last month and helped out her pal when she was struggling to wind the little boy.
Kimberley said: "Cheryl came over and helped me out when Bobby was having a windy, whingey day.
"She had a really good winding technique - I actually hadn't tried it but it's a good one. It worked and calmed Bobby and she got a massive burp up straight away.
"She's a natural, but she'd had lots of practice as she has 12 nieces and nephews.
"It's nice to have an extra pair of hands, especially when Bobby isn't very settled."
Last week, Kimberley performed at the Specsavers Spectacle Wearer of the Year awards and admits it was a "challenge" returning to work.
She added to OK! magazine: "I had it in the diary for ages but when it came to actually going back to work for an evening relatively soon after having Bobby, I found it a challenge.
"It's quite early to go back to full-on performance mode, but it was nice to sing again and I soon got into my stride.
"It was weird being away from Bobby for a few hours, although he was with me for rehearsals during the day."

Nicole Kidman is channelling her grief into screenplays.
The 47-year-old actress was left devastated last month when her beloved father Antony Kidman passed away but she is finding writing a useful outlet for expressing her emotions.
She said: "I have two screenplays that I'm in the midst of forming.
"I've had a very, very rough few weeks and a lot of the way in which I express myself is through writing.
"I don't know if I'm any good, but it's somewhere I can seek solace."
The 'Paperboy' actress - who has daughters Sunday, six, and Faith, three, with husband Keith Urban, and Isabella, 21, and Conor, 19, with ex-husband Tom Cruise - says her father's death has taught her to "live in the moment" and try not to worry about things.
She added to Grazia magazine: "I've gone through a tragedy which has absolutely shattered our family.
"It's taught me to live in the moment because you never know what's going to happen. Dad lived like that. He would always say, 'Nicci, don't worry, be happy.'
"He was a psychologist. He was a giver. And that is what I hope he's given me and my sister. That's what we always say we will continue to do. We will live the way he lived. I had an incredible father."

Miranda Lambert and Blake Shelton have given Kelly Clarkson's daughter a personalised guitar.
The 32-year-old singer - who gave birth to the little one in June - took to her Twitter account to thank the country music couple for gifting her and husband Brandon Blackstock's child River Rose with the musical instrument, which has her name emblazoned on the neck.
Kelly tweeted a picture of River sitting on a seat next to the guitar complete with the caption: "Aunt @mirandalambert & Uncle @blakeshelton 4 the win! She is destined 2 b a Country/Rock legend with this! Thnx guys! (sic)"
Not content with posting just the one picture of her daughter today (14.10.14), the 'Because of You' hitmaker posted another image of Brandon holding the youngster.
She wrote: "Okay this is adorable @BBlackstock 🙂 Had to share! River loves her daddy & morning time! (sic)"
Earlier this month, Kelly admitted her adorable child was "worth" going through a tough seven months of illness.
She wrote: "7 months of projectile vomit = horrible. My baby girl in my arms falling asleep as she talks to herself = worth it 🙂 #riverrose (sic)"
Kelly and Brandon were recently said to want a huge family because she is "loving every single moment of motherhood".
A source said: "Don't expect River to be their only baby as Kelly and Brandon want a big family.
"Kelly is loving every single moment of motherhood. Being a mother is something Kelly has always wanted, so this is truly a dream come true for her. But it doesn't take away from the fact that she's a singer and an entertainer and misses it.
"Kelly is eager to return to the stage, but her focus is one million percent on her family right now."