The princess of pop looked visibly scared when she was escorted away during her last song at the sold-out Piece of Me show.
During her performance of 'Till The World Ends', a man hopped on stage and sprinted towards the singer.
Fan-footage shows one of Britney's security guards immediately blocking the man's attempt to get near her.
Britney - wearing a red leotard and leather boots - is unaware of the incident unfolding behind her.
She is then surrounded by a group of security guards as the man is thrown to the ground.