I think my iTunes is a kind of strange and embarrassing mix of show tunes and artists that I have no perception of whether or not they're huge or not, you know? I'm the kind of person who doesn't realize that The Arcade Fire is a big deal, but then I expect everybody to know Cocoon, and people tend to not know Cocoon.
You can relax more when you're playing a silly character than when you're playing a really rigid character. But to be fair, I think George Clooney is a bigger teenager than any of the 'Twilight' cast. He's the guy throwing a football at your head and then hiding around the corner, pretending it wasn't him!