Canadian teen idol Justin Bieber has been attacked during a concert in Dubai.
The 19-year-old mega-star was at a piano during set closer Believe when the attacker struck.
Security guards tussled with the offender as Bieber's song continued to play. A fan captured the incident on a mobile phone.
The star reportedly enraged fans the previous night, and again on Sunday night, when he turned up two hours late for both concerts.
According to UAE's The National website Bieber returned three minutes later for an encore finishing with songs Boyfriend and Baby.