Even the backup dancers got involved in the tussle.
Britney Spears' first Piece of Me concert back at her Vegas Residency at Planet Hollywood on Wednesday saw a lot more drama than just her show.
During one of her last songs of the night, a man rushed the stage from behind trying to 'join in' but was quickly jumped on by security and her cohort of backup dancers.
A very shocked Spears turned around and panicked, asking, "What's going on. Who's been hurt. Does he have a gun?"
You can visibly see her knees buckles as security hastily escort her off the stage while fans look on in horror.
The man - later identified by the Las Vegas PD as 37-year old Jesse Webb was handcuffed and forcibly removed from the stage and taken to the Clark County Detention Centre.
Spears returned when things had calmed down to perform her last song of the evening.