Jason Wahlersays Heidi Montag is "a liar" and "a hypocrite."

Lauren Conrad's ex sat down with E! exclusively on camera at his Hollywood home Thursday morning to talk about Heidi Montag and Spencer Pratt's claims that Jason made a sex tape with Lauren Conrad and then threatened to sell it. Speidi had also challenged L.C. to take a lie-detector test.

Wahler told E! there never was a sex tape, that he would take a lie detector to prove there is no sex tape and that Spencer needs to "get a life."

Check out the video to see what else he says about Spencer, Heidi and the sex-tape controversy.