Lindsay Lohan was allegedly punched by a waitress while celebrating turning 24 last night.

The actress` birthday is actually today, but she couldn`t wait to hit the town with friends. She partied at Los Angeles nightspot Voyeur, where she was allegedly attacked by a mystery woman.

"A waitress just hit me - punched me for no reason," Lindsay wrote on her Twitter page.

Lindsay is currently sporting an alcohol-monitoring SCRAM ankle bracelet in relation to her 2007 conviction for Driving Under the Influence (DUI). She spent the evening sipping Red Bull drinks with pals, including reality TV star Doug Reinhardt.

Although the exact cause of the reported conflict is unknown, sources suggest it was related to Lindsay`s friendship with Doug. "The waitress has a history with Doug Reinhardt, and Lohan was hanging out with him. She was jealous, and out of nowhere, the waitress punched her in the face," a source told Us Weekly magazine. "Doug didn`t want any part of it and went to the other side of the booth. Lohan ran out."

Lindsay decided to take her party to Rockstar House, which was close by, but was devastated to find the woman was already there. "Lohan showed up and cried because the waitress was there as well," another source explained.
sections: Celebrities