The actress-turned-(recovering) drug addict, who is facing another stint in jail over charges of theft, was left humiliated when doormen turned her away from the party which was hosted by talent agent Gus Oseary.
Lilo rocked up to the bash with her brother and security team, confident that she'd be welcome despite not having been invited, but she never got any further than the front door.
When she spotted actor Josh Brolin arriving at the party, she flagged him down and asked him to help her get in.
The True Grit actor did his best, asking the doormen, "Don't you know who this is?"
They said they did, but that they weren't going to budge.
As Josh made his way inside, Lindsay finally gave up and left, muttering, "This is so humiliating."