Hilary (Duff) is a teen actress. She played Lizzie McGuire on a TV show of the same name, and has tried to start a singing carreer, as well as still being an actress.
As for the rest of it, I like Evanescence and don't see what Hilary is talking about saying they have a bad influence. Unless she is simply referring to Amy Lee's semi-goth look.
Through it all, I'd still bone either one of them.
H-D 