Why do people hate Justin Bieber?

It's so obvious that people are hating on him because he has the fame and money, and he's young and good looking. Yes his voice hasn't broken yet, but who cares? The boy can sing and I personally love all his songs. If singers like Usher and Ludacris thought Justin Bieber was just a little girl singing would they even come in his videos or help him gain fame? I don't think so. People are being such haters because of pure jealousy.