The 34-year-old singer performed at PrideFest on Sunday in New York City, where she took the stage in a skin-tight, sheer black ensemble. Rimes definitely appeared to enjoy herself, throwing her hands up in the air with a huge smile on her face.
Rimes previously opened up to ET about her fitness routine, and said she works out four or five times a week for an hour to maintain her super toned physique.
"Things are still in place at the moment so I don't have to work too too hard on it, but I enjoy working out," she said. "I feel like it's part of my health, it's part of my job. I've also found things that I enjoy doing, and I try to switch it up because I get really bored."
"I box and I do yoga, I do pilates and I hike," she added.
Rimes has been back in the headlines this month, thanks to her reignited feud with husband Eddie Cibrian's ex-wife, Brandi Glanville. In a lengthy statement obtained by ET, the former Real Housewives of Beverly Hills star called out the singer for her "obsession" with her, and claimed she was being harassed online by Rimes' employees.