Anger as Justin Bieber late for London O2 gig

Teen pop idol Justin Bieber has angered parents by emerging onstage for a concert at London's O2 Arena almost two hours late.

While the 19-year-old singer's young fans were kept waiting, frantic parents converged on the venue expecting to pick up their children.

It follows reports Bieber's gig in Nottingham on Saturday also began late, BBC reports.

Fans tweeting from inside the O2 said there were boos from some in the crowd almost an hour before he emerged.

Speaking outside, one fan said: "They were playing Michael Jackson song, after song, after song - it was so annoying.

"Everyone was on edge and as more time passed, everyone was getting more worried and booing."

Tracey Wilson, from Hoddesdon in Hertfordshire, was at the concert with her daughter.