Dancing With The Stars All-Star EditionABC this morning unveiled the cast for the upcoming all-star edition of Dancing With The Stars. Coming back are previous contestants Kirstie Alley, Pamela Anderson, Helio Castroneves, Joey Fatone, Shawn Johnson, Drew Lachey, Gilles Marini, Kelly Monaco, Apolo Anton Ohno, Bristol Palin, Melissa Rycroft and Emmit Smith. The 13th celebrity will be determined by viewers through voting, with Sabrina Bryan, Carson Kressley and Kyle Massey competing for the spot.