Bieber shouts 'I'll go out when I want to' before turning up at gig two hours late

Justin Bieber allegedly ranted "it's my gig, I'll go out when I want" before going out late for his performance at London's The O2 on Monday.

The 'Never Say Never' star turned up on stage nearly two hours late for the event - his first of four nights at the venue as part of his 'Believe' tour - and he was reportedly "arguing" with his management backstage before eventually starting his show.