Carrie Underwood 'Keeps It Real' in Makeup-Free Workout Selfie -- See the Pic!

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Carrie Underwood isn't afraid to get a little sweaty.
The 33-year-old singer took to Instagram to share a selfie from her workout on Thursday, no makeup and all!
"I'm a sweaty mess, but I’m a sweaty mess in an adorable tank! @cailabycarrie #staythepath #nomakeup BeNice #run #KeepingItReal #cardio #love," she wrote, along with her barefaced pic. 

Of course, the "adorable tank" Underwood was sporting was a top from Calia, the line of activewear she launched last year. The new mom hasn’t been shy about touting her own collection on Instagram.

As for the secret to her toned physique? It's all about simplicity!
"You don't need that much," she told ET in May. "I like free weights and a Bosu, and you're in business. Maybe a medicine ball. I do lots of squats and lunges, and I like to run, I like to run outside if my knee allows me to. But just body weight stuff, push-ups, pull-ups."
"It doesn't have to be complicated," she added.
See more in the video below.