Justin Bieber's habit for stripping off has reportedly landed him an endorsement deal for Calvin Klein underwear.

The Baby hitmaker has become known for showing off his branded boxer shorts in recent months by posting a number of 'selfies' online, and now sources tell DailyMail.co.uk he is set to be unveiled as a new spokesmodel for Calvin Klein by the end of 2014.

An insider says, "Justin has shot for Calvin Klein, we hope the results will be released later this year."

If the news is true, Bieber will join the likes of rapper-turned-actor Mark Wahlberg and British supermodel Kate Moss, who have both previously posed for Calvin Klein underwear.

Dutch model Lara Stone fronts the brand's current advertisements.