In the main event, Light Heavyweight Champion Randy "The Natural" Couture puts his belt on the line in a rematch against Brazil's Vitor "The Phenom" Belfort. The co-main event features the top lightweight, BJ Penn, moving up in weight to challenge five-time defending champion Matt Hughes for his Welterweight belt. The undercard features such UFC stars as Frank Mir, Carlos Newton, Lee Murray, Josh Thomson, Hermes Franca and "Charuto" Verissimo rounding out the even!