It's fun to stay at the Chateau Marmont.

It's no secret Lindsay Lohan loves to party — even when she isn't invited. After breaking up with on-again/off-again girlfriend Samantha Ronson, the 22-year-old was denied entry into the launch party for Charlotte Ronson's JCPenny line at Bar Marmont on Friday. We're told security was under strict orders not to allow Lohan inside and that it took several guards to hold her back at the door.

But when Lohan couldn't party at Bar Marmont she then snuck into the bungalow area of the Chateau and went on a door-knocking rampage. The actress obviously heard word of an all-girls night in and even though she didn't know the party peeps personally, she wanted to be part of the action.

"There was a knock-at-the door and Lindsay Lohan was there," an eyewitness told Tarts. "She was as orange as a carrot and her pupils were as big as quarters. She looked awful!"

Apparently the 22-year-old introduced herself and said "Let's party!" but even when the ladies tried to close the door on her she continued to push back. Eventually the annoyed guests locked the door, but our girl stayed pounding away for another minute before (finally) getting the hint and moving on.

Lohan eventually turned to Twitter for comfort after the night fell flat, reportedly tweeting on her private page about how her DJ lover had been turning-the-tables with other ladies.

A rep for Lohan did not respond for comment.

However it seems the young starlet wasn't the only crasher cruising around the Chateau on Friday.

After being hospitalized for mysterious gastrointestinal problems last week, apparently actor Josh Hartnett was ready for a good time. We're told Hartnett and a posse of four guys showed up at the same room about two hours after Li-Lo.

"They were told that they weren't welcome but somehow Josh got in about and left all of his friends standing outside on our doorstep," an insider said. "He made his way into the kitchen and poured himself a teacup full of vodka."

But when asked what on earth he was doing, Hartnett said he was "trying to pour a round of shots for everyone" — but his act of kindness wasn't well received.

"He slammed down the teacup, walked out the front of the door and yelled 'I guess I owe you a sip of Vodka!'" added our source.

Goodness — guess it wouldn't be showbiz without the bleeping bizarre.


god i hate josh hartnett, he strikes me as SUCH a douche. but lol at whoever these girls were kicking all these people out of their party.