Rihanna and Louis C.K. were the special guests 40th season finale of SNL. RiRi has been a regular on SNL since her early career, giving us plenty of tweetable TV moments which now include stellar performances of "Bitch Better Have My Money" and "American Oxygen." The performance is vastly different from back in 2012 when she rocked a more subtle look for “Diamonds” and “Stay.” Fans on Twitter have mixed responses on the performance—some say she was lip-syncing—but we’ll let you make your own judgments. Watch it above, as well as her performance of "American Oxygen" below.