Justin Bieber has abandoned his pet puppy Karma.
The 'Boyfriend' hitmaker left his American bulldog pup with a dog trainer back in February and hasn't returned for her.
Trainer Trevor Dvernichuk told The Sun newspaper: "This is like taking your kid to school and not picking it back up."
Trevor was originally asked to take care of the pup for a few weeks, so he could train her before Justin, 20, assumed responsibility for her once more.
But not only has the pop superstar failed to return to collect Karma, he hasn't even responded to calls from Trevor.
Justin got Karma around Christmas 2013, finding the puppy at Ruffin's Pet Centre in Stratford, Ontario.
At the time, Justin's dad Jeremy asked his legion of fans to help name his son's new pet.
He tweeted: "So we're gonna let one lucky #belieber name @justinbieber's new puppy.... Follow and find out how it can be you)."
Later, he revealed: "so we have got a name selected for the newest Bieber. Big thanks to @justinfredos the Belieber who chose it ".Karma" (sic)."
Meanwhile, in December 2012, Justin randomly gave away his pet hamster, Pac, to a fan at a Jingle Ball concert.

John Cleese got married for a fourth time because he's "a romantic".
The 'Monty Python' star tied the knot with current wife Jennifer Wade, 43, in August 2012 and he says their shared sense of humour is what convinced him to do it.
The 75-year-old actor - who was forced to pay his third wife, US psychotherapist Alyce Faye Eichelberger, a substantial divorce settlement in 2008 - reflected: "I think deep down I'm a romantic.
"As I say God put me on the planet to understand women better so how am I going to do that?
"I'm going to find another one. So I'm now very much in love with Jen - or Fish as they call her because she swims like a fish - and we laugh immoderately and are wonderfully rude to each other.
"People think we're having a row and we're just falling about with laughter."
John also looked back on his acrimonious split from his ex-wife Alyce, whom he was with from 1992 to 2008.
He told the Sunday Night programme: "She went after me really quite brutally by hiring the nastiest - and I don't mean the second nastiest or the third nastiest - but the nastiest lawyer in Santa Barbara.
"My wife went and hired this really nasty woman and I had to giver her $20 million. It's not fair."

One of Russell Crowe's best friends was a cocaine dealer to David Bowie.
The 'Noah' actor claims Mickey Castellano, an on-set costumer, sold drugs to Bowie at the height of his fame in the 1970s during a new show called 'The Truth About Us', in which a well-known public figure is interviewed alongside a close friend.
Russell, 50, explained: "He said to me one day, 'You know, I did two albums with Bowie and two albums with Purple', Deep Purple."
At that point, Russell asked: "'You did two albums with Bowie and two albums with Deep Purple, what did you do, like backing vocals or something like that?' He goes, 'No, no, no, I was their coke dealer!'"
The Academy Award-winning actor initially didn't believe his close friend, but his view changed when he took Castellano to one of Bowie's concerts.
He recalled: "We're at this concert and we're backstage. And I'm like, 'Good to see you, David! Hey, can I just introduce you to a friend of mine? Apparently he knew you quite a long time ago?""
Russell was surprised by the reaction of the legendary singer, now 67.
He explained: "Bowie's face went white. Like white as a sheet, like a ghost. He's just standing there, and he goes, 'Michael!' And it's like, holy s***, what am I witnessing here?'
"Bowie is shaking, he's like, 'Michael, I don't do drugs any more!' and Michael's like, 'David, David, neither do I! You know, I'm 15 years clean!'"

Rochelle Humes has had her Christmas decorations up "for ages".
The Saturdays star loves the festive season and her band-mate Una Healy says Rochelle leaves no stone unturned when it comes to celebrating the big day in style.
Speaking at the première of new Christmas movie 'Get Santa' in central London earlier today (30.11.14), Una told BANG Showbiz: "I'd probably say Rochelle would do the best Christmas dinner [out of the band members].
"When it comes to Christmas, she's already had her decorations up for ages. She loves cooking as well, she's always cooking things and posting them on Instagram, and I imagine she'd do a mean Christmas dinner."
Rochelle, who is married to former JLS star Marvin Humes, 29, with whom she has 18-month-old daughter Alaia-Mai, recently launched her own Christmas clothes collection for Very.co.uk.
The 25-year-old beauty - who launched her first collection for the online retailer in June this year - told MailOnline: "Christmas is the perfect time to go all out and get really glammed up as you can't be too overdressed.
"I can't wait to be in sequins head-to-toe, that's what my navy number is for!"

Harry Styles left a Hollywood nightclub in the early hours of Sunday morning (30.11.14) with two women.
The One Direction star - who has previously dated the likes of Taylor Swift and British TV presenter Caroline Flack - was seen leaving The Nice Guy club at around 3am, when he got into the back of a waiting car with both girls.
The sight of Harry, 20, emerging from the club comes shortly after the singer claimed he and his One Direction band-mates - Niall Horan, 21, Liam Payne, 21, Zayn Malik, 21, and Louis Tomlinson, 22 - are still growing up.
Harry admitted that in spite of their worldwide fame and success, they are learning how to be men and get self-conscious on occasion.
He said: "I think that people imagine that if you're in a band you kind of lose all normal things. But we still have every insecurity every 19 or 20-year-old guy has."
Meanwhile, Zayn is reported to have postponed his wedding to Little Mix star Perrie Edwards, 21.
The Sunday Mirror newspaper claims Zayn has delayed the wedding, which was set for next year, because their respective schedules are simply too busy.

Chris Hemsworth finds it "exhausting" carrying extra weight when he plays Thor.
The 31-year-old star - who was recently named PEOPLE magazine's Sexiest Man Alive - admits he usually goes on a diet after playing the 'Avengers Assemble' character because none of his clothes fit.
He said: "When I'm not doing that character, I want to get lean again as quickly as possible, because carrying that weight is exhausting. And none of my clothes fit."
The Australian actor relies on a combination of weight lifting and bodybuilding to get him in shape for the role, but admits he doesn't pile on the pounds that easily.
He said: "I'm lucky. Genetically I don't put on weight easily. I like running, surfing or boxing, and I did Muay Thai for a long time. If I have a goal, I'm really good about what I eat - protein, veggies, clean food and restricted carbohydrates. Cheat days are pizza, hamburgers, beer, sugary things. Everything I'm not allowed to have!"
Chris also enjoys getting massages to help him relax after a long workout.
He said: "I love massages - hard Thai ones. I hate falling asleep during them. I want to know something is happening."
Despite putting a lot of work into his physique, Chris insists he is very low maintenance when it comes to grooming.
He added to PEOPLE magazine: "I'm sick of my hair. I have a hat on most of the time just so I don't have to deal with it. I don't like being clean-shaven, because my skin feels likes it's going to break out in a rash, so I clipper it nice and short."

Mel B dated a woman for four years.
The former Spice Girls star - who is now married to second husband Stephen Belafonte - has confessed to having had a long-term relationship with a woman in the past but insists she is now very happy being married to a "penis".
She said: "Well, I did have a four-year relationship with a woman. But I've been very happily married for seven years to a penis. Ha ha! An amazing guy."
And, although former Playboy model Lusann Lee claimed Mel followed her into a toilet for an "intimate moment" last year while Stephen waited outside, the 39-year-old star insists she and her husband are not in an "open" relationship.
Mel shared: "No, me and my husband are very tight and solid. But I will be the first one to compliment a woman, to say to my husband, 'Oh my God, look at her legs', or 'Doesn't she look stunning?' I do think women are gorgeous. Crazy but gorgeous."
Meanwhile, the 'X Factor' judge - who has 15-year-old daughter Phoenix and seven-year-old daughter Angel from her previous relationships with Jimmy Gulzar and Eddie Murphy and three-year-old daughter Madison with Stephen, 39 - admits she and her husband are "sexually compatible in every way".
Explaining what she means when she says they are both "perverts", Mel told the Guardian newspaper: "Well, everybody sees the word pervert as something different, and I don't want to tell you what my pervert-ness is, or what his is ... It's nothing too extreme, it just works.
"Let me put it this way, we're just very sexually compatible in every way. We think very much alike, and we get turned on by the same things."

Ben Haenow is wary of reconnecting with his estranged father.
The 'X Factor' contestant was brought up by his mother Rosanna after his father Michael walked out on him and his brother Alex when he was just four-years-old and although he's now back in touch with him, Ben admits he's struggling to get his "head around it".
He shared: "Now that I'm on the show, he's texting me, saying, 'I really love you, Ben, I'm so proud of you'.
"But he's never said stuff like that to me before. We didn't really get on that well. Anything I was interested in, he wouldn't take an interest in."
Admitting he was taken aback when his dad got in touch, Ben added: "I reply but not immediately. It takes me a while to get my head around it."
However, despite claiming he doesn't think Michael is simply contacting him for the fame that comes with being on 'The X Factor', Ben admits his past makes him question his motives.
He told The Sun newspaper: "Alex and I had a rocky relationship with our dad.
"He was supposed to see us on Sundays but regularly we would be waiting on the corner of our road and he wouldn't turn up.
"He then met his second wife and she seemed to do a lot to get us involved in his life but he wasn't too bothered.
"We'd meet every couple of months or so - but then he left her as well."
Explaining that he thinks his father has contacted him because he's getting older and is "alone", Ben added that he doesn't think they'll "ever be close".

Zoe Ball could be set to front a new Saturday night game show.
The 'It Takes Two' presenter - who recently covered for Claudia Winkleman as co-host on 'Strictly Come Dancing' - is set to become the BBC's new Saturday night queen as the face of 'Prized Apart'.
A source revealed: "Zoe is at the top of the list of people being looked at.
"She is funny, quick-witted and appeals to viewers of all ages. She was a revelation on Strictly and fits the bill perfectly. She can virtually name her price."
Zoe stepped in for Claudia after the regular host's eight-year-old daughter Matilda was hurt in an accident on Halloween and she's now said to be in negotiations to accept a deal worth £1.5 million.
'Prized Apart' - which is scheduled to air next year - will feature ten couples going up against one another in challenges in a bid to win huge cash prizes and Zoe is said to "excited to be so highly though of", although no agreement has been reached as of yet.
A BBC spokesman told the Daily Mirror newspaper: "'Prized Apart' will feature couples up for an adventure. One will stay in the UK while other the other competes in challenging tasks worldwide.
"No decision has been made about who will present the show".

Zayn Malik has reportedly postponed his wedding to Perrie Edwards.
The One Direction heartthrob was due to marry his Little Mix star fiancée, 21, next year but the pair are now said to have put their plans on hold because of their hectic schedules.
A source revealed: "There's been all this talk of a wedding, Perrie wanted a big Disney-themed day but the reality is they've had to put it back. There isn't time to plan a day that will be perfect for the two of them."
Zayn, 21, and his bandmates - Louis Tomlinson, 22, Liam Payne, 21, Harry Styles, 20, and Niall Horan, also 20 - announced the UK dates of their 'On The Road Again' tour yesterday (29.11.14), leaving them booked up until late 2015.
The source told the Daily Mirror newspaper: "They're both so busy, they have decided they will have to have a long engagement.
"Who knows when the wedding will be now, but there are no plans at the moment."
Meanwhile, the 'Steal My Girl' hitmaker - who was recently accused of having a drug problem by 'Today' show presenter Matt Lauer - is said to be trying to lead a more normal life.
The insider added: "Zayn and Perrie are trying to spend as much time together as possible - because their commitments clash so much.
"When they are both away from home working, finding time together can be difficult."

Kerry Katona has slammed reports her marriage is on the rocks.
The Atomic Kitten singer was reported to have cancelled a family holiday to Cape Verde this Christmas because husband George Kay, 34, had been acting "jealous and clingy", but she's now spoken out to rubbish the claims.
She wrote on Twitter: "Every girl dreams of finding her knight in shining armor, but not me...I've already got mine. 😉 @mrgsjkay xxxxxxx (sic)."
Former rugby star George was detained under the Mental Health Act earlier this year after suffering a meltdown outside their Oxfordshire home, which he blamed on mixing alcohol, steroids and sleeping pills, and Kerry was reported by a newspaper as questioning their relationship after he walked out on her during a number of arguments.
The publication quoted a source as saying: "She [Kerry] won't talk about why they row, she just says he's very possessive and insecure.
"She says he's walked out a few times."
However, 34-year-old Kerry - who was previously married to Westlife singer Bryan McFadden and Mark Croft - has now shot down the idea of a possible split.

Jake Gyllenhaal has sold his house for over $3 million.
The 'Nightcrawler' actor has made a profit of nearly $1 million after selling the gated compound in California's Hollywood Hills for $3,262,500 after splashing out $2.5 million on the property in 2005, the Los Angeles Times newspaper reports.
The single-story home was built in 1948 and has nearly two acres of land, a swimming pool, detached office and canyon, mountain and cityscape views.
The 33-year-old star's former home includes a central hall, a den, a family room, three bedrooms and three bathrooms and was previously owned by Michael 'Flea' Balzary of the Red Hot Chili Peppers.
Meanwhile, Zachary Quinto - who is best known for playing Spock in the latest 'Star Trek' movies - has sold his home in Los Feliz for $1,278,600 after listing it at $1,165,000 in September.
The property, which Zachary bought for $865,000 in 2008, is described as having a "loft-like vibe" with an open floor plan and features a living room, den, three bedrooms and two bathrooms.
The single-story house was also built in 1948 and was sold by Sotheby's International Realty.