Carrie Underwood co-hosted the 2019 CMA Awards in Nashville on Wednesday night (Nov. 13), and she had a little fun with some unsuspecting fans in the runup to the live ceremony. Underwood taped a segment for Jimmy Kimmel Live! in which she surprised random patrons at a store in Nashville by singing to them, and their reactions are priceless.

Underwood dropped in on the shoppers at a boot store in Nashville in a segment called "Undercover Sing." The country superstar was hiding in the back of the store as patrons came in, unaware that they were on camera. The store employees asked each customer to share a little about themselves, while unbeknownst to them, Underwood was using it all for lyrics that she would then sing over the public address system in her unmistakable voice.

Watch the patrons' hilarious reactions in the video above as Underwood sings personalized lyrics about everything from one woman's purple hair to a man's blue sweater, all to the amazement of the shoppers. The high point of the video may be when Underwood, still out of sight, commands that man to dance for her, offering to pay for his boots if he does so — all set to the tune of her smash hit, "Before He Cheats."

"If you do a dance for me / You're gonna get those cowboy boots for free / So start moving and shake your derriere," Underwood sings. When the customer actually does briefly dance, she then seizes on that, continuing, "Dance again and don't you stop / In your cute blue sweater top / I promise those boots will be on me." The amazed man looks around, laughs and continues to dance, and his wife even gamely joins in.

Underwood returned to co-host the CMA Awards for the twelfth time in 2019, this year joined by special gusts co-hosts Reba McEntire and Dolly Parton for a ceremony that paid tribute to the historical contributions female artists have made to country music. Though she didn't win any awards, Underwood went into the ceremony as a multiple nominee, including a nod in the night's most important category, Entertainer of the Year.

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