UFC kicks off 2011 in Las Vegas with a New Year's celebration like no other. UFC lightweight champion Frankie Edgar defends his crown against the only man to beat him, undefeated number one contender, Gray Maynard. Plus, always exciting middleweight contender Chris Leben looks to keep his hot streak going against ''All-American'' Brian Stann, and all-action Clay Guida takes on Japanese icon Takanori Gomi.