Justin Bieber surprises fans with impromptu performance

Pop star Justin Bieber surprised the crowd at West Hollywood club 1 with an unannounced performance that included "Sorry" and "What Do You Mean".

"Come on. If you're not feeling this right now...," Bieber, who also brought Tyga to the stage, is heard joking in video footage of his appearance.

"How many people thought that you would like Justin Bieber?" he mused.