After being dubbed a professional party crasher this week, Lindsay Lohan showed up at Perez Hilton's birthday bash on Saturday at LA's Paramount Studios - and was invited in!
RadarOnline.com was there to catch the troubled actress in all her hard partying glory.
Lindsay arrived late and quickly posed for photos before heading to a booze-filled private table with her 16-year-old sister Ali in tow.
The sisters rocked out to performances by Eve and Leona Lewis inside the carnival themed bash, where Lindsay was spotted chain smoking and drinking cans of Red Bull.
Lindsay showed up at Hollywood hot spot Trousdale on Thursday night to attend a Victoria's Secret party, only to be blocked at the door by a bouncer.
"As soon as she strolled up to the door, the rope was quickly pulled in front of her," our spy said.
"She tried to pass the big bodyguard but he blocked her way."
Despite LiLo's protests "the security guys weren't having it and escorted her to the exit," the source continued.
There was no social snub on Saturday night - and Lindsay took full advantage of Perez rolling out the welcome mat.