Summary:
"Justin Bieber kept thousands of school-aged fans up past their bedtime at a sold out show in London on Monday night.

Full article:
London (CNN) -- Singer Justin Bieber kept thousands of fans and their tired, outraged parents up way past their bedtime Monday after arriving on stage nearly two hours late for a sold out show at London's O2 Arena. Bieber was greeted by choruses of boos from the sell-out crowd amid scenes of tearful devastation as scores of sobbing school-aged "Beliebers" were hauled away minutes into the singer's set by parents desperate to catch last trains home on a school night. .