I'm a bit worried about this too...I have friends who love Gerard Butler just because of Phantom.
And it's kinda already started. Back in the fall, my 15 yo cousin asked me about (the actual conversation)
Cousin: Rent. That thing the N'Sync guy was in.
Me: What about it?
Cousin: Isn't it a movie?
Me: Um...will be next year.
Cousin: Oh. I wanna see it.
Me: Good for you. It's a good show.
Cousin: Uh huh...is the guy hot?
Me: WHAT?
Cousin: You know the guy. The guy who the N'Sync guy played.
Me: You mean Mark?
...and so on...
"During this performance, please feel free to let your cell phones and pagers ring willy-nilly. However, do remember that there are heavily-armed knights on stage and you might well be dragged up and impaled."
(Pre-curtain announcement at the new Broadway musical Monty Python's Spamalot)