At the CRS New Faces of Country Music Show last night (March 1), Florida Georgia Line performed, closing out their set with their No. 1 hit 'Cruise.' That's nothing out of the ordinary, right? Wrong! While it was an expected and high octane way for Brian Kelley and Tyler Hubbard to end the set, the performance got a major dose of star power when Taylor Swift "cruised" onto the stage to join the band for an impromptu duet.