Carrie Underwood is at her fittest at 39 years old. The country singer, who just released her new album Denim & Rhinestones, is currently enjoying the success of her new music while looking incredible in her fabulous stage outfits.
Read on to learn about the activities that help her stay in shape, as well as the photographs that prove they work—and don't forget to check out the 30 Top Celebrity Swimsuit Moments to become beach-ready too!