VIDEO : Britney Spears' fan rushes the stage, is tackled by security mid-show

Britney Spears had a scare on Wednesday night when an overzealous fan jumped on stage while she was performing in Las Vegas.
Jesse Webb, 37, was arrested for trespassing by Las Vegas Metropolitan Police Department officers.
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Spears can be heard asking a security guard who came to her side, "What?s going on??