Justin Bieber performed live free concert last night, May 30, 2012, at the Opera House in Oslo, Norway. Justin announced the concert on twitter and the site quickly became overrun with screaming fans. According to MTV News, police nearly canceled the concert because of safety issues.

Justin took to twitter to help calm the fans and to allow the show to proceed. He tweeted, "Please listen to the police. I don't want anyone getting hurt. I want everything to go to plan but your safety must come first...For the show to happen u must all listen to the police. We are all concerned for your safety and I want what is best for u. Please listen."

Check out more pictures of Justin's performance in Oslo below!



Photo Credit: Ian Gavan/Getty Images Europe