WATCH: Justin Bieber 'Attacked' On Stage

A crazed fan stormed onstage and grabbed singer Justin Bieber from behind on Sunday in Dubai during the middle of a piano performance.
The 19-year-old Canadian pop star was performing one of his last songs, Believe, when a youth in a white shirt and jeans blindsided the unsuspecting singer.
Bieber managed to free himself and dashed to the side of the stage.
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Onstage drama: A youth rushed the stage at Justin Bieber's concert in Dubai on Sunday and grabbed the singer from behind

Security guards rushed the stage and lunged at the attacker, according to a report in Dubai English language newspaper The National.

The stage stormer pushed the piano off its hinges and it fell damaged to the stage.
A video posted by a fan online showed security guards rushing around the stage as the piano lay upturned.
An accompanying tweet said: 'Whoa. Crazy fan tackled @justinbieber and knocked the piano down the stage. Mayhem.'