If there's a Belieber in your life (or if you've hit Twitter in the last 24 hours), you're probably well aware that Justin Bieber is the new face of Calvin Klein.
Apart from being colossally famous worldwide, Biebs got this gig by repping CK a bunch and generally being very comfortable taking his shirt off. But! He's done both of those things so much in the recent past, we have to wonder: Can you sniff out whether a photo was meant for the big name campaign or is just another shirtless pic?
Take our quiz and see how you do!