What's with all this Bieber Fever stuff?

Ookay i dont wanna hear "Because hes hot" or "because hes amazing" or anything like that! I just wanna know why teenage girls my age find him attractive, why they think they're all gonna marry him, and why he has a great voice or whatever!? Because i'm not the one to be up with trends and stuff so yaaa...... It really bugs me and I've seen girls litterally throw out half their life for this boy! Thanks! ♥