See Carrie Underwood Strut Through a Fiery 'Undo It' in Surprise Show

Last month, Carrie Underwood wowed an intimate audience in Atlanta with a surprise performance at the Variety Playhouse. With nine of her biggest hits, including current single “Smoke Break,” the CMA Awards co-host’s up-close-and-personal set would qualify as a one-time-only experience — had the concert not been filmed for CMT Instant Jam. The…