LC Boo Hoos, Pooh-Poohs Sex Tape Rumor

Lauren Conrad has named a former friend as a culprit in spreading rumors of a sex tape featuring the "Hills" star and her ex, multi-arrestee Jason Wahler. The annoyed LC denies the existence of the tape.

In an interview with Us magazine, sources close to LC say she's "pointing the finger" at former friend Heidi Montag and BF Spencer Pratt, because Montag was the "one person who didn't reach out" after news of the tape broke. Watch your back in them thar Hills!

Montag and Pratt denied any wrongdoing ... and so far, no sex tape has surfaced.