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. 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!

Ellen celebrates Cinco de Mayo, and you're invited to the party. Check out what happens when Ellen is let loose on historic Olvera Street in Los Angeles and receives a lesson in Mexican culture. Joining Ellen for this celebration is ELLEN POMPEO from the hottest series on TV, "Grey's Anatomy." And, CRAIG FERGUSON ("The Late Late Show with Graig Ferguson") talks about his best selling book, "Between the Bridge and the River."