Justin Bieber strips down as the new face of Calvin Klein.

Justin Bieber is baring it all, and the results are rather impressive. The singer has put his taut abs and ripped body on display as the latest underwear model for Calvin Klein. Clearly, Justin is no stranger to working out, and it shows! Justin seems to know the significance of being featured in the legendary ad campaign, posting this photo to his Instagram with the caption, "Officially a part of the legacy.