I'm getting worried about Justin.  He's just not acting right lately.  Let's hope he gets himself together and doesn't end in rehab. :(

Here's what happened last night:

"I was at the concert and he [Bieber] came out at 10:15 p.m. and Carly Rae Jepsen finished her set at 9:10 p.m.. Justin should have been out at 9:30. Everyone was kept waiting not knowing anything. All they did was kept playing Michael Jackson songs. All the fans were getting so annoyed at around 9:50 p.m., fans started booing."

"I stayed! But many people left early as the last underground train was at 12 a.m., so people needed to get home. He didn't even apologize. That's what makes it worse…My mom paid for five tickets so she's not happy."

*UPDATE*  Justin said:  

“since i have been here it hasnt been easy with the press at times but I have loved it. so let me say this…” Justin wrote in the beginning of his apology on Twitter. “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…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 Im proud of that”

“and tonight we will run on time and look forward to putting on an amazing show for everyone in attendance. my relationship with the media is not always easy but im trying. Im all about the music and the performance and i respect my fans.” Justin added. “now we have a show to do today and Im gonna focus on the positive and put on a great show tonight here in London”