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Ooooh. Drama!

Lindsay Lohan was banned from the party for fashion designer Charlotte Ronson‘s I Hear Ronson clothing line for JC Penney. Lindsay Lohan tried to enter the party where Samantha Ronson was DJ-ing at, but Linsday was blocked from entry to the party by five bouncers. Sounds like some trouble in lesbian lover land.

Sources tell OK! the doormen were apparently under strict instructions from the Ronson family to look out for Lindsay and not to let her in under any circumstances.

The party officially ended at 11pm on Friday, but an hour later, Sam was still spinning records inside, while Charlotte, their brother Mark — whose band played an hour-long set at the event — and their mom, Ann Dexter Jones partied on.

Before Lindsay’s arrival at the event, an insider told OK! that the Ronsons had gone out of their way to insure she wouldn’t be able to get inside. “Unless Lindsay rams a truck through the red carpet or skydives in, she won’t be here,” revealed the source.

But just as expected, Linds still showed up, only to be “restrained from coming in by five security guards,” according to an onlooker.

“Lindsay knew she was unwanted, but came anyway, to no avail,” said another source.

Judging by her behavior inside the event, Sam was completely fine being in a No-Lohan zone. “She looked like she was in a great mood,” one witness tells OK!.

While LiLo couldn’t get beyond the guardians at the gate, other celebs, including Nicole Richie, Molly Sims, Sting and Jewel, had no problem getting into the event. Even Paris Hilton was welcome. The celebutante arrived around 10:15pm on the arm of her boy-toy Doug Reinhardt. “She really seemed to be glowing!” one partygoer tells OK!.

I’m wondering where the bouncers were the other night at the Lily Allen concert when Lindsay popped up on stage?

Gallery Info: Sting, Trudie Styler, AnnaLynne McCord, Mark Ronson, Simon Rex, Kim Kardashian, Rob Kardashian, Paris Hilton, Doug Reinhardt, Samantha Ronson, Charlotte Ronson, Rachel Zoe, Matthew McConaughey, Stephanie Pratt, Jewel, Milla Jovovich, Ann Dexter Jones, Fisher Stevens, Rashida Jones, Frankie Delgado, Nicky Hilton, David Katzenberg, Camille Guaty, Tony Kanal, Rachel Sterling, Daveigh Chase, Cory Kennedy and Stephen Dorff at the I Hear Ronson event for JC Penney at Bar Marmont.