There were dramatic scenes at Britney Spears' gig in Las Vegas the other night after a fan rushed the stage.

The singer was performing at her residency in Planet Hollywood in the city, and had just finished miming singing her song 'You Drive Me Crazy' when security suddenly rushed on stage to tackle an invader.

Two other members of the security team then swept a flustered Spears backstage, after she said 'Is something okay? What's going on?', while some reports suggest that she says 'He's got a gun?' although that is not clear.

The 37-year-old man was later arrested and was not found to have any weapons. Reports suggested that he had been acting erratically throughout the gig and jumped on stage when he was asked to leave.

Watch the incident below: