Celebrity News:

If several suspicious and grainy screen shots are to be believed, Lindsay Lohan is the latest celeb (in a string of too many) to find herself exposed in an internet-leaked sex tape.

The video, which was taken with a camera phone, leaked online Thursday and allegedly depicts Lohan performing a sexual act on her boyfriend of last summer, Calum Best.

According to Britain's Sun newspaper, the former model and UK tabloid staple sent the video to a few of his friends, who then forwarded it online.

Neither Lohan nor Best have been reached for comment, naturally--and it's not for certain whether it is really Lohan in the video.