Adam Levine wasn't quite cover-boy material back in high school, but he was pretty darn cute. Now, though, he is People's 2013 Sexiest Man Alive, engaged to model Behati Prinsloo, coaching The Voice and, yes, pretty much winning at life. But, back to high school—Adam, now 34, did suffer from a just touch of acne. The pros of this? Well, it builds character, and in Adam's case, led to a lucrative ProActiv spokesman gig years down the line!