Lohan, 26, came over to the private party and began screaming that Eastwood should leave, shouting "I'm a star, she's a nobody, get her out of here!", reported Us magazine.
"Francesca was celebrating her birthday with around a dozen friends in a private area when Lindsay came over and started screaming that Francesca should leave "She was yelling 'I'm a star, she's a nobody, get her out of here!' One poor guy came over and tried to calm (Lindsay) down and she acted aggressively.
At that point the security told her to leave and it was totally embarrassing. She is acting like some bad '80s film star, and it is hard to watch because she needs help," a source said.
Whereas, birthday girl Eastwood agreed that she and her pals were all baffled by the troubled starlet's behavior but added it did not put a damper on her celebration. "I'm not sure what exactly sparked Lindsay's outburst. Regardless, I still had an amazing birthday and Parent Trap is still my favorite movie," Eastwood said.