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  (Photo: Reuters/Brendan McDermid)
  Pop sensation Justin Bieber

Justin Bieber has leapt to the defensive via Twitter after a disastrous concert in London on Monday night.

The freshly 19-year-old singer agitated fans and parents alike after starting the show at the O2 Arena almost two hours later than advertised. As fans grew increasingly anxious, frantic parents also became annoyed, resulting in widespread booing once Bieber finally appeared.

Nevertheless, the "Boyfriend" singer took to Twitter with a series of apologies and admissions on Tuesday.

"Since I have been here it hasn't been easy with the press at time but I have loved it. So let me say this," Bieber began on the social media site. "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… soo…"

While Bieber claimed to be only 40 minutes late for his performance, he admitted, "There is no excuse for that and I apologize for anyone who was upset."

"However it was a great show and Im proud of that," added the "Baby" singer.

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Moving on, Bieber assured his followers that tonight's show would be on time before he addressed his issues with the press.

"My relationship with the media is not always easy but I'm trying," wrote the singer. "Im all about the music and the performance and I respect my fans. 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."

London's O2 Arena also addressed the punctual error, posting to Twitter: "Justin Bieber is now on stage and apologises for the lateness of his show."

On Tuesday, it added that it will be "exploring all available options to ensure this doesn't happen again."

Meanwhile, many parents chided Bieber for not only disappointing their children, but for wasting their own time and money.

"Kids were crying because some of them did not have the opportunity to see Justin Bieber," parent Andy Ward told BBC. "I feel frustration. It is outrageous that there was no communication from the organizers. It makes you very angry that he can get away with it."

The concert misfortune arrived just days after Bieber rang in the "worst birthday ever" in the British capital.