Video: Uh-Oh! Justin Bieber Busted Lip Syncing During Stage Attack

Justin Bieber Photo: FameFlyNet.Com

Justin Bieber must be the world's greatest performer. Over the weekend, an overzealous fan jumped on stage as Bieber was performing in Dubai and knocked over Justin and he didn't even lost a beat....well, at least the recording didn't lose a beat.

In the video above, a fan gets on stage and tries to get to Bieber and while a bodyguard catches the guy, they run into Justin and knock over his piano. The music doesn't stop...and neither does Justin's voice.

Things that make you go.....hmm.-DocFB

Diagnosis: Memorex....