A 'youth in a white shirt and jeans' went onstage to touch Bieber who was sitting down at a piano but security guards quickly tackled the man, causing the huge piano knocked off in the attempt, while Bieber managed to escape to the side of the stage.
He continued performing as if nothing happened. Staffers returned the piano to its original position, but it was reportedly damaged and could not be used, reported Aceshowbiz.
Meanwhile, Bieber reportedly made his young fans and their parents upset for coming two hours late to the Dubai concert.