Bristol Palin, Joey Fatone, Kirstie Alley and Apolo Ohno are to compete on the all-star edition of "Dancing with the Stars" in Los Angeles, ABC said. Also set to compete on the show this fall are their fellow former contestants Gilles Marini, Melissa Rycroft, Pamela Anderson, Kelly Monaco, Shawn Johnson, Helio Castroneves, Drew Lachey and Emmitt Smith, it was announced Friday. Viewers will vote on the 13th contestant from among Sabrina Bryan, Carson Kressley and Kyle Massey. The contestant who wins the vote will be announced Aug. 27 on "Good Morning America."