During his concert in Dubai, a crazed fan slipped past the Bieber's security and stormed the stage, getting really close to the pop star … a little too close. This all happened while the Biebs was doing his thing on the piano. The perp was immediately tackled by security. Bieber didn't seem fazed by the ordeal. He went on with the show making the many thousands of screaming young girls in attendance very, very happy.