Carrie Underwood starred in a Nashville-themed version of Undercover Sing on Tuesday’s Jimmy Kimmel Live. Underwood set up in the back of a boot store. As customers came in, the store workers asked them questions. They revealed enough details for Underwood to sing a personalized song to them over the loudspeakers. As Underwood sang, the customers were confused until she came out to greet them. You can see more of Underwood at Wednesday night’s CMA Awards. What was the best prank pulled on you?