Hot on the heals of the those Kristin Davis sex pictures, comes a blurry snap of what is supposed to be Lindsay Lohan engaged in a sex act with former boyfriend, Calum Best.

The grainy pic was posted on a gossip forum, along with claims that there is an accompanying sex tape.

The poster wrote:

"ok well remember that whole lindsay lohan callum best sex tape thing a while back.. that turned out to be bogus..untill now.

apparently callum sent the video (which was filmed on his cell phone) when the 2 where an item has been sent to some of his friends...which as you may have guessed have been trying to sell the video.

Anyway so i have this friend (cant say her name.) who is friends with lindsay lohan. She's just emailed me saying that someone has sent an email to lindsay with a screen clip from the movie, and shes freaking out because she "cant remember it being filmed."

You can play the ‘Is it Lindsay?’ game by clicking here. Needless to say, NSFW!