Reba McEntire, Collin Raye and John Mellencamp are among the celebrities appearing at Muhammad Ali's Celebrity Fight Night XIV taking place April 5 at the J.W. Marriott Desert Resort in Phoenix. The event benefits the Muhammad Ali Parkinson Center at Barrow Neurological Institute in Phoenix and other charities. During the event, McEntire will be honored alongside actor Kevin Costner, record executive Clive Davis and San Diego Chargers running back LaDainian Tomlinson. Raye and Mellencamp will perform during a concert that also features Dionne Warwick, Jordin Sparks, Fantasia and Sinbad.