Lindsay Lohan's (Sober) Birthday Brawl

Looks like Lindsay Lohan received an unwanted birthday present. The socialite celebrated her 24th birthday early this morning as she usually spends her time, at a nightclub; but unfortunately she was allegedly confronted with some drama — a punch in the face from a cocktail waitress.

"Lindsay was partying and dancing when a cocktail waitress punched her in the face," an eyewitness at Voyeur nightclub — where LiLo was soberly partying — tells OK!. "Lindsay isn't sure exactly what she did but it was out of nowhere. Lindsay was not happy about it and yelled back at the girl."