** FILE ** Comedian Dave Chappelle attends a reception at the Muhammad Ali Center in Louisville, Ky., in this May 5, 2006, file photo. Chappelle was hospitalized over the weekend for exhaustion, his publicist said Tuesday. The 33-year-old comedian checked into an emergency room on Saturday, July 14, 2007, and was released a few hours later, publicist Carla Sims said. (AP Photo/Brian Bohannon, file)