Justin Bieber ATTACKED During Dubai Concert [VIDEO]: Crazed Male Belieber Fan Storms Stage, Grabs Singer, Knocks Over Piano, Show Goes On

During Justin Bieber's "Believe" world tour concert in Dubai on Sunday evening (May 5), a crazed Belieber fan stormed the stage and lunged towards the "Beauty and the Beat" crooner. The male "attacker" was quickly pursued by security as he grabbed onto the Biebs and the 19-year-old pop megastar's grand piano was knocked over during the mayhem. Although quite shocked, Bieber took a short break and promptly returned to the stage to finish off the show.

Several (non-overzealous) fans managed to capture the JB onstage attack on video... check it out:

According to the English-speaking Dubai newspaper "The National," the crazed Belieber fan was wearing a white t-shirt and jeans when he frantically stormed the stage to get a piece of the Biebs. As seen in the video, Bieber's guards quickly jump into action. As the attacker grabs onto the singer, he's suddenly flung to the ground and contained. But during the quick pursuit, Bieber's grand piano is harshly shoved and as a result topples to its side.

Bieber was in the middle of performing one of his last songs ("Believe") when the show was suddenly interrupted by the mega-fan. Although a bit shaken-up, Bieber and his eight-piece band finished the song while the attacker was being subdued by security. After a three-minute break, Biebs returned for an encore with his hit tunes "Boyfriend" and "Baby."