With Ellen DeGeneres as the newest American Idol judge, there is never a lack of laughter on or off the screen. Many may have been wondering what had Simon Cowell laughing on last weeks show, and Ellen fills fans in today on The Ellen DeGeneres Show.

What do you think of Ellen's bunny prank?

OK! VIDEO: FAN PLAYS PATTIN' PATTINSON ON ELLEN DEGENERES

Simon will be on her show tomorrow!