Lindsay Lohan had a wild night with Justin Bieber BEFORE her crazier half of the night at a New York nightclub.

This photo of Lindsay at Biebs' Madison Square Garden concert has surfaced, and Lilo seems to be in great spirits.

However, hours later, Linds was involved in a fight in which she reportedly punched a woman in the face.

We doubt Biebs' music put Lilo in a fighting mood, but you never know! Baby, baby, baby oooooh ...