The reigning world champions of football and reigning CMA Entertainer of the Year collided Thursday night, as Taylor Swift performed for NBC's NFL Opening Kickoff show. The country superstar performed her hit songs 'Mine' and 'You Belong With Me' for a sea of fans in New Orleans' Jackson Square, before the 2010 Super Bowl-winners, the New Orleans Saints, hosted -- and beat -- the Minnesota Vikings in the NFL's season opener. Watch Taylor's live performance below.