MARTIN SHORT brings a "Bad Acting Clip" and a "Bad School Photo!" Then, he and Ellen go to the backyard and chat in the hammock. Ellen delivers a Vegas themed stunt monologue. ELLEN POMPEO ("Grey's Anatomy") explains how she knows Tony from years ago... (more). Ellen welcomes back Fallon Childs and "Nana" and looks at clips from their Mother's Day trip to Vegas! SCOTT SAVOL, the latest cast-off from "American Idol", performs! Ellen goes to the backyard to play horseshoes with a world champion horseshoe pitcher. And, highlights from the Mother's Day VEGAS TRIP!