Lily Allen ended up in tears while performing at her last gig at London's O2 Arena.

The 'Smile' hitmaker apparently got disturbed when she saw two people in the audience fighting.

She went off stage, while the perpetrators were forced to exit.

"That's the worst sort of violence - it's f****** sick and you lot should be ashamed of yourself," the Mirror quoted Allen as saying.

Meanwhile, Allen is set to open a vintage fashion shop. (ANI)