Marc Jacobs – Shirtless Celebrity Studs

This one's a double feature and stars superstar designer Marc Jacobs (on the left) and his boyfriend Harry Louis. Betcha didn't think designers could be this buff.

In order to stay fit, Marc works out every morning, takes vitamin supplements and lifts weights at the gym -- but barely does any cardio. (So unfair.)

He lost 30 pounds back in 2006, and that came with some surprises. As he explained, "I still think it’s hysterical people want me to take my shirt off. [I'm 50], so I guess I should be glad. It feels like the decade of me taking my shirt off."