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 that Bieber's gig in Nottingham on Saturday also began late.
Fans tweeting from inside the O2 said there were boos from some in the crowd almost an hour before he emerged.
'Just a shambles'
Tracey Wilson, from Hoddesdon in Hertfordshire, was at the concert with her daughter.
She told Tony Livesey on BBC Radio 5Live that Bieber had been due to start at 20:30 GMT.
She said: " The support acts came on but they ran over until about ten to nine, and then we sat there until twenty past ten for Justin to come on..
"A few of the parents went up to the information desk to complain and they were saying there's nothing they could do and that 'It's just Justin Bieber's production team'.
"We said that was all well and good, but most of us have to get trains... it was just a shambles. I said we've really got to leave at ten to eleven to get the last train."
She added that people in the crowd began booing at about 21:30, almost an hour before Bieber's act eventually started.
No-one connected to the show has commented, but the venue apologised for the late start via its Twitter feed.