It's kind of an old chick flick, either in the late 1990s or early 2000s. This teenage guy who's in a famous boy band gets sick, then wakes up in a teenage girls room, without her knowing he's there. When she wakes up she goes and tells her best friend over the phone, because they're big fans of his. He tells her that he needs to leave, but she asks him to stay. Her parents and brother don't know about him staying there, so he only stays in her room.

The female teenage character has dark hair and the guy who's in the boy band has brown hair I think. Hope this is a good description.
Please help, I've been trying to figure out so long what this movie is called.

The Biggest Fan (http://en.wikipedia.org/wiki/The_Biggest_Fan)