Lily Allen broke down in tears and fled the stage during a concert on Sunday night (07Mar10) - after a brawl broke out among fans.
The Smile hitmaker was performing at London's O2 Arena as part of her tour with rapper Dizzee Rascal when two men in the audience began fighting.
The singer burst into tears and walked offstage while security officials ejected the men from the venue. Allen came back out to finish her set after a two-minute break.
She told the crowd, "That's the worst sort of violence. It's f**king sick and you lot should be ashamed of yourself."
Later in the show, Allen dedicated her song F**k You to Britain's Conservative Party leader David Cameron - who last month admitted he has banned his six-year-old daughter Nancy from listening to Allen's music as the lyrics are "unsuitable".