Bieber Shows 2 Hours Late as Fans Boo But Justin says he was just 40 minutes delayed By Evann Gastaldo, Newser Staff Posted Mar 5, 2013 10:04 AM CST Updated Mar 5, 2013 10:46 AM CST 25 comments Comments Canadian singer Justin Bieber performs at the O2 Arena in east London, Monday, March 4, 2013. (Photo by Joel Ryan/Invision/AP) (Newser) – Justin Bieber was greeted at London's O2 Arena last night not with screams and tears of joy but with boos and the tears of children up past their bedtimes. Fans say he came onstage two hours late, with booing starting an hour before he finally showed, the BBC reports. But Bieber responded to the complaints on Twitter, Sky News reports, and the singer claims he was only 40 minutes late— that he was "scheduled to go on stage at 9:35, not 8:30, but because of some technical issues I got on at 10:10." He apologized, but also grumbled about the "exaggerated" reports. Unhappy parents, however, say he showed up close to 10:30pm—on a weeknight, no less. Some had to leave early after paying hundreds of dollars for tickets, in order to catch the last train home. "Kids were crying because some of them did not have the opportunity to see Justin Bieber," says one dad who waited in the parking lot until after midnight to collect his daughter. The arena says it is "exploring all available options to ensure this doesn't happen again." The snafu follows earlier reports of long delays at Bieber concerts and events.