@kimzolciakbiermann / Instagram 1 / 9
@kimzolciakbiermann / Instagram 1 / 9

Kim Zolciak is waisting away!

The "Don't Be Tardy" realty star showed off her shrinking waistline (again) in a mirror selfie on March 24, and the results look pretty good.

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Kim recently jumped on the celebrity waist training regimen, joining the like of Kim and Khloe Kardashian who can't get enough of the body shaper.

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In Kim's newest selfie, she rocks ripped jeans and a t-shirt showing off her taut midriff. She captioned the photo, "Werking……" with a few movie camera emojis.

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Earlier in the month, Kim took a similar selfie with her waist trainer on.

"Soooo you guys finally talked me into trying a waist trainer!" she captioned the photo. "I can't believe how tiny it makes my waist I'm obsessed with @nowaistclique waist trainer and it doesn't show through my clothes!"