Justin Bieber apologized for arriving for a performance in London on Monday night.

Three acts opened the show before Bieber was set to headline the show.  When the other acts were finished, and it was Bieber's turn, the fans patiently waited. Eventually, their patients grew thin as they continued to wait for the superstar's arrival.

"Last night i was scheduled after 3 opening acts to go on stage at 935 not 830 but because of some technical issues i got on at 10:10..so..." Justin Bieber tweeted after the show.

During the concert, tweets from parents whose children attended, were angered toward Bieber's tardiness. They were furious on how late it was getting, considering it was a school night. Others were mad because there was a chance of missing the last train for the night for the children to get home.

"I never have any intent to upset or let anyone down. and Im not okay with things being exaggerated. once again sorry for anyone upset," Bieber would tweet after the show.

Finally, at 10:36 p.m., the O2 arena itself apologized for the late start, tweeting, "Justin Bieber is now on stage and apologizes for the lateness of his show.  It added, "Sorry to all the Justin Bieber fans for the lateness of his show tonight. The tube (Subway system) will still be running when the show finishes."

Parents didn't take too kindly as per a lot of them paid for their children's tickets to the show.

Bieber would continue to tweet away about what happened Monday night in London.

"I was 40 min late to stage. there is no excuse for that and I apologize for anyone we upset. However it was great show and I'm proud of that," Bieber tweeted.

One fan told US Weekly that the program was cut short due to his lateness. The fans who waited as long as they did, didn't receive the usual length of songs from the teen-idol.

Bieber is set to take the stage for another show in London on Tuesday.

"And tonight we will run on time and look forward to putting on an amazing show for everyone in attendance," Justn tweeted.