Once you're successful with a certain kind of music, it's hard not to have faith in it as a means to stay successful.
I feel like girls in general will always worry about the same things, and it's all appearance related. That will always be there. When you grow older, you grow more confident with who you are.
Dark books do appeal to kids because they have nice, sheltered lives - and they also appeal to children who are going through pretty hard times themselves.