Bieber managed to piss off a lot of fans! He was two hours late for his concert at the O2 arena in London!!! And on a school night! One witness said people really started getting mad after the opening acts:

“Everyone was kept waiting not knowing anything. All they did was kept playing Michael Jackson songs. All the fans were getting so annoyed at around 9:50 p.m., fans started booing.”

Plus he had to cut his set list short cause he was late. And he didn't even apologize until later...on Twitter! WTF, Justin?! You're a little young to be this big of a diva!