Carrie Underwood and Jimmy Fallon Compete in Fitness Challenge

When Carrie Underwood stopped by The Tonight Show Starring Jimmy Fallon this week, she wasn't there just to promote her new health and fitness-related book, Find Your Path. She actually showed viewers how it's done, when Fallon introduced a little competition he called the "Fittest of the Fit Challenge."

Underwood, of course, was game to take him on. The two proceeded through a three-course challenge in which they crept around on the floor matching their hands and feet to pictures (Fallon dubbed it "Dance Dance Revolution meets Twister"), had Underwood navigate a maze blindfolded while Fallon held a plank, and blew ping-pong balls at each other while performing bear crawls.

It sounds daunting, but of course Underwood prevailed, getting her game-on spirit and squealing "I win!" (Watch above for the full fun segment.)

Underwood, 36, offers fans a detailed look at her healthy lifestyle in her new book, which was released on Tuesday (March 3). For those fans who want to join her fitness journey, she's launched a corresponding app, Fit52, that provides users with tools and activities to get in great shape.

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