I watched too much "Growing Pains" when I was a kid to ever hear Robin Thicke sing and not imagine that it's actually Mike Seaver on the mic. (I watched too much "Growing Pains" as a kid full-stop, I know.) But he has become a real, legitimate R&B artist—and a good one! He's always at his best with Lil Wayne, too. Robin Thicke! Who woulda thunke?