Bethenny Frankel, 51, displays her impressively taut abs as she flashes Skinnygirl underwear

Bethenny Frankel put her impressively taut abs on full display on Thursday as she gave her Instagram viewers a peek at her underwear, which was made by her brand Skinnygirl.

Bethenny Frankel Posts Unfiltered Bra-and-Underwear Selfie: 'This Is Me at 50

Bethenny Frankel Rocks Underwear & Sexy Tank Top — Photo – Hollywood Life

Video: Bethenny Frankel flaunts her toned body in Skinnygirl underwear

Bethenny Frankel Posts Unfiltered Bra-and-Underwear Selfie: 'This Is Me at 50

Bethenny Frankel, 51, displays her impressively taut abs as she flashes Skinnygirl underwear

Bethenny Frankel - Latest news, views, gossip, photos and video - Page 4

Bethenny Frankel, 46, flaunts her toned bikini body as she splashes around with boyfriend Dennis Shields in Mexico

Bethenny Frankel, 51, displays her impressively taut abs as she flashes Skinnygirl underwear

Skinnygirl by Bethenny Frankel, Seamless Shaping Brief Underwear Black/Nude/White - 3 pack Small : : Clothing, Shoes & Accessories

See Bethenny Frankel Accidentally Flash Her Panties On Anderson

Bethenny Frankel, 51, displays her impressively taut abs as she flashes Skinnygirl underwear

Bethenny Frankel Rocks Underwear & Sexy Tank Top — Photo – Hollywood Life

Bethenny Frankel shows off her toned abs in a striped bikini while hitting the beach in Sag Harbor

Bethenny Frankel flaunts her slender waistline while plugging Skinnygirl bras

Skinnygirl by Bethenny Frankel, Seamless Shaping Briefs Multi Color Medium : Clothing, Shoes & Jewelry