Yep, Perez Hilton and John Mayer kissed.

To prove that he and the singer kissed, he took a lie detector test with an examiner from Fox’s hit show The Moment of Truth.

He invited Usmagazine.com to tape the exam.

Hilton was asked a series of questions after he declared on Ryan Seacrest’s KIIS-FM show Thursday that Mayer kissed him “on the mouth with tongue.”

He also said Mayer’s girlfriend at the time, Jessica Simpson, was “rubbing [Mayer's] crotch” during the kiss.

Watch the video here!