Popstar Justin Bieber expected hysterical screams from teenage fans, but surely did not expect to get attacked on stage by a crazy fan in Dubai recently during a concert. The unsuspecting twiggy popstar was ambushed by a crazed male.

The incident has sparked major security concerns for the teenager’s safety after he was ambushed from behind by the ‘fan’ midway through a piano performance. In a video uploaded on You Tube, the attacker is seen storming the stage and grabbing Bieber sending the piano crashing over as the pair tussle to the ground. The 19-year-old singer freed himself and fled to the other side of the stage as security lunged at the potentially dangerous stage stormer.