The Ultimate Fighting Championship will be bringing out the big guns for what promises to be one of the most talked about events of 2011. In the main event, pound for pound king Anderson ''The Spider'' Silva looks to extend his reign when he defends his middleweight crown against history-seeking Vitor ''The Phenom'' Belfort, a fighter looking to become only the third man to win UFC titles in two weight classes. Plus, light heavyweight superstars Rich Franklin and Forrest Griffin slug it out, and two of the game's rising stars, Jon Jones and Ryan Bader, meet in a clash fight fans have demanded.