Justin Bieber Performs on Top of the Opera House in Oslo, Norway

"The pop star responded to the mass chaos in Oslo, requesting that his fans 'please listen' to law enforcement officers. Bieber fever has reached epic proportions in Norway. Oslo police reportedly are on the verge of declaring a state of emergency after tens of thousands of Justin Bieber fans turned out for the singer’s appearance at the city’s famed opera house. Bieber is scheduled to perform four new songs during the show, which is being filmed as part of his Around the World TV special. TMZ reports that police have lost control of the massive crowd and have asked the pop star to take the stage early in an attempt to control the chaos. Bieber is said to be currently waiting in a secret location before he is helicoptered to the stage. Bieber pleaded with his fans on Twitter, writing, 'NORWAY – 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.'" [Source] Watch a video clip after the jump.