Paris Hilton had one, and only one, lesson to teach the girls of the world. Do not let some dumb boy press record. Yet, some celebs just don't seem to learn. One starlet who needs her head checked is Miss Lauren Conrad -- the latest victim of a scandalous video tape about to hit the Internet. Who's the dirty leak?

Her co-star in the intimate film, Jason Wahler.

"Jason is trying to sell the video before he goes to jail," a source close to Wahler tells Perez Hilton. "LC will lose her mind when she finds out!"

Listen up, Heidi! In case we weren't completely clear, note: If you don't want to see all of yourself plastered on the Internet in compromising situations, don't set up the camcorder for the main event.