Justin Bieber’s personal trainer insists he IS as well endowed as Calvin Klein pictures suggest

We don’t know whether we’re coming or going with Justin Bieber – we’ve been staring at his hunky bod in his new Calvin Klein campaign for days now and, quite frankly, our head hurts.

Lets break this down: last week pictures of the Baby singer were published by the fashion house after he was signed up to be their new model.

He featured in the snaps alongside model Lara Stone and the pop star looked pretty hunky and like he was packing something pretty impressive in that underwear of his.

But on Friday a picture emerged of the musician which a website claimed was an unretouched image from the shoot.

In the image, which allegedly showed his ACTUAL body, his muscles were less impressive and his bulge was less, well, huge.

Well, it seems Biebs wasn't happy with speculation his muscles and peen are actually smaller than they appear in the official pics and the website has now apologised to the star which means that may be all him.

And Justin’s personal trainer has even spoken out in defence of the star, saying he does have a lot stuffed in his pants.

He said: “I can definitely confirm that he is a well-endowed guy. I sound weird saying that, but yes.”

Nice.

GALLERY: Justin Bieber for Calvin Klein