"It was pretty hot," admitted fellow judge Randy Jackson.
The incident occurred during a screen test for the radio shock jock to see how he would interact with the other judges, during which Stern almost immediately began badgering DeGeneres and DioGuardi to make out.
"C'mon, just one kiss. I won't be able to concentrate on the contestants unless we get this out of the way," Stern can be seen saying on the audition tape, which was acquired by TMZ.com. "Make out for 30 seconds and we can all get on with our day."
"OK, now with tongues," he added when they finally acquiesced, prompting a three-minute kissing and fondling session.
"Excuse me, I'm trying to sing Pants on the Ground up here!" exhorted contestant General Larry Platt, who was brought back specifically for Stern's audition. But Platt could not get the judges' or crew's attention over all the hooting as DeGeneres and DioGuardi groped each other.