Lindsay Lohan has denied being caught on camera taking cocaine in the bathroom of a Hollywood house-party.

A blonde who looks very much like the troubled Mean Girls star is seen through an open window enjoying a private party with group of males, in photos and video footage posted by paparazzi agency X17online.

Their blog identifies the male seen at the start of the video as old Lindsay frenemy and 'Firecrotch' starter Brandon Davis.

But the sometime actress has taken to Twitter to deny being the girl in the clip.

"Hahaha x17online posted photos of NOT ME inside someone’s bathroom," she Tweeted.

"All negativity & bad karma..nice try though kids-u should do a deal with michael lohan sr :) a match made in heaven! perfect, he’s religious! Thank you for keeping my company!"

Lindsay pictured leaving the house party on November 13 (Splash News)

What's known for certain is that Lindsay was inside the West Hollywood residence when the video was reportedly taken.

She was pictured emerging at around 7am in the morning, after hanging out with other guests including frenemy Paris Hilton, her sister Nicky Hilton and shipping heir Stavros Narchos.

Watch the video below.