Giving a new meaning to the phrase “Poker Face…..”

Lady Gaga was performing at a radio concert for Vic Latino’s Party 105 FM earlier this year when she accidentally wacked a backup dancer in the mouth with her microphone.

Ouch.

T7Live.com writes: Within moments, blood was streaming down her mouth and she had to run offstage to an awaiting ambulance that was equipped for heart attacks, gun shot wounds, poison control, fainting spells, and lacerations, but not cosmetic dentistry.

The unidentified dancer, who reportedly lost three teeth in the freak accident, later under went dental surgery to have her teeth capped, at Lady GaGa’s expense, of course.