Justin Bieber continued his My World Tour with a show in front of 11,000 screaming fans at London’s O2 arena last night. The 17-year-old Canadian singer played a set full of hits and was accompanied by Willow Smith, daughter of famous actor Will Smith. When he jumped up on stage, the singer seemed completely unaware that he was giving his fans a little more than they bargained for because the zipper on his pants was gaping open. Instead of turning to zip it up, he kept his hand over his crotch when he did hip thrusts in the direction of his fans.

Because of his large and enthusiastic fan base, Bieber was almost unable to make it to his show. Fans gathered outside his hotel and the crowd was so large that the police warned Bieber they would arrest him for “inciting a riot” if he stepped outside the building. The young pop star was reportedly infuriated however, when two female fans snuck inside the hotel and used stolen housekeeping uniforms to sneak into his penthouse and take pictures of some “highly personal” items before security realized what was going on.

Bieber’s tour continues tomorrow with another show in London playing in places like Manchester and Sheffield throughout the month of March.