Singer Justin Bieber (L) And Model Lara Stone During The 'Fashion Rocks 2014' Concert
Justin Bieber has showed off his ribbed abs and a great physique on the cover page of a famous health magazine for men. The 21-year-old has also blasted critics who say that his pictures are photoshopped. Singer Justin Bieber (L) takes his shirt off as he and model Lara Stone introduce an act during the "Fashion Rocks 2014" concert in the Brooklyn borough of New York September 9, 2014. Reuters/Carlo Allegri

Justin Bieber allegedly acted like a "douche" when he was shooting for the ad campaign of Calvin Klein underwear and even hit on fellow model Lara Stone several times during the shoot, various websites are saying. The pop star has been roped in as the official brand ambassador of the luxury underwear brand and recently shot for its new campaign with married model Lara Stone. Stone, who is a mother too, reportedly had to stop the 20-year-old by calling him a "child."

"He was basically a douche. He hit on [fellow model] Lara several times and she had to stop him, basically calling him out on being just a child," a source present at the shoot told Breathe Heavy. According to another website Blind Gossip, Justin reportedly kept "licking his lips" and repeatedly asked Lara to "party with him." "She wasn't having any of it! She told him, "Look, I don't party. I am married. I am a mother. And I am old enough to be YOUR mother"," says the magazine, quoting the same source.

However, neither Lara not Justin commented on the incident. Contrary to the "douche" version, US Magazine says that Justin was a thorough professional during the shoot and he showed up early every day with "amazing energy." The "Boyfriend" singer completely trusted the Calvin Klein team and "gave his all" for the shoot, Melisa Goldie, Chief Marketing Officer at Calvin Klein told the website adding that both Lara and Justin gave "pointers" to each other during the shoot. The ex-boyfriend of Selena Gomez reportedly played ping-pong game with the crew during his breaks and gave a really "impressive" performance, notes Melisa. She also stated that she is "incredibly proud" of both Justin and Lara and believes that the campaign will "make history."

Dutch model Lara Stone faced severe backlash from "Beliebers" or the fans of Justin for posing intimately with the pop star. The model put her hand casually on Justin's crotch in the pictures and they both pose topless for the campaign, a fact that was not like by the female fans of the singer. Female "Beliebers" also issued death threats to Lara for her actions.

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