Singer Justin Bieber's photograph for the new Calvin Klein underwear ads, has reportedly been heavily retouched to lend him a bulky frame.

The website BreatheHeavy.com claims that "someone connected" to the 20-year-old's Calvin Klein photo shoot emailed them a picture before it was altered, reports dailystar.co.uk.

The alleged unedited image shows Bieber with a bigger head, smaller biceps and a reduced-sized bulge, when compared to the ads that were unveiled earlier this week.