Did someone punch Taylor?

During a recent performance on her RED tour, Taylor Swift found herself in a little bit of trouble. While singing her hit " I Knew You Were Trouble," Tay got so carried away that she accidentally smacked herself in the mouth! "I quickly pulled my microphone up to sing and basically punched myself in the tooth," Taylor explains about the switch. But like a pro, Tay continued the show without a hitch. Wow!