Yeah, It was crazy, I was at this concert. He just ran up on stage, but the funny thing was that He looked like he was part of the show, She was performing WOMANIZER, so it seemed as if he was the Womanizer and he was being taken out by the dancers. Then when Security Jumped on stage and pushed him down the stairs hard *** hell, i realized he was a crazy fan. It was a very Interesting Show. BRITNEY F'*** ROCKS!