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.

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Skinnygirl by Bethenny Frankel, Seamless Shaping Shorts Nude/Black/Taupe- 3 Pack Medium at Women's Clothing store

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

Bethenny Frankel flaunts her Skinnygirl figure in black and white bikini as she hits beach in Miami

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

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

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

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