'My friends like making fun of me': Justin Bieber admits he takes some teasing for those sexy Calvin Klein underwear adverts

His Calvin Klein ad campaigns have been the center of many punchlines including Saturday Night Live star Kate McKinnon's parodies.

But Justin Bieber recently admitted that he gets the most jokes from his inner circle.

On Thursday, the 21-year-old pop star spoke with Us Weekly at a Calvin Klein event in Hong Kong telling the publication: 'My friends like making fun of me.'

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Butt of all the jokes: Justin Bieber attended the Calvin Klein Jeans Music Event in Hong Kong on Thursday

Butt of all the jokes: Justin Bieber attended the Calvin Klein Jeans Music Event in Hong Kong on Thursday

For Justin being ridiculed in public comes with fame - even voluntarily asking for a Comedy Central Roast. And with the recent billboards of his half naked underwear photos plastered around the biggest cities in the US, Justin's cell phone is blowing up with funny text messages from his friends.

'I get a lot of texts from my friends like making fun of me,' he said of his adverts.

'Like taking pictures with it or like pulling up their shirt just messing with me like "I see you - you're too big and buff." You know? It's fun.'

Justin and Calvin Klein remain tight lipped about just how much Bieber earned with his coveted contract, but no doubt Biebz is laughing all the way to the bank.

'I get a lot of texts from my friends like making fun of me': The 21-year-old pop star's underwear ads were released in January 2015

'I get a lot of texts from my friends like making fun of me': The 21-year-old pop star's underwear ads were released in January 2015

Flashing: 'I've been working out recently, but when I was doing a shoot I would spend like two weeks before the shoot just really grinding it, working out every day, eating healthy'

Flashing: 'I've been working out recently, but when I was doing a shoot I would spend like two weeks before the shoot just really grinding it, working out every day, eating healthy'

Close friend Kendall Jenner was also recently named the newest CK ambassador joining the ranks of supermodels Kate Moss, Lara Stone and Christy Turlington.

When Justin's ad campaign was first released in January, many claimed that the photos were retouched to give the bad boy more muscles and a bigger bulge. 

However, the Baby hitmaker told Us: 'I've been working out recently, but when I was doing a shoot I would spend like two weeks before the shoot just really grinding it, working out every day, eating healthy.'

And these days, Justin confessed he's a bit more lax about his workout regime. 'Now I'm kind of like, I gave up a little bit - but not really,' he said.

Mocking: His Calvin Klein ad campaigns have been the center of many punchlines including Saturday Night Live star Kate McKinnon's parodies

Mocking: His Calvin Klein ad campaigns have been the center of many punchlines including Saturday Night Live star Kate McKinnon's parodies

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