Celebrity What Cheat Day? Kourtney Kardashian Shares an Abs-Baring Bralette Selfie By Brandi Fowler Brandi Fowler Instagram Website In addition to her extensive fashion, lifestyle, and beauty coverage for InStyle, Brandi has worked as a writer and editor for E! Online, a fashion and lifestyle writer for Hello! US, an editor/on-camera host for AOL, contributing writer and red carpet correspondent for Variety and Cosmopolitan, and has also served as the Hollywood correspondent for Australia's 9News' TheFIX. Her editorial features can also be found on Vitruvi, MTV News, Madame Noire, Hello Beautiful and more covering fashion, beauty, lifestyle, travel, and entertainment news. Her articles have been syndicated by the likes of Health, Marie Claire, Essence, Shape, Yahoo!, People, and more. InStyle's editorial guidelines Updated on May 17, 2016 @ 06:00PM Pin Share Tweet Email Photo: Taylor Hill/FilmMagic There's no sign of a cheat day here. After nailing it on the blue carpet of the NBC Universal Upfront in a white Sergio Hudson suit complete with a white lace bralette underneath (above), Kourtney Kardashian showed off more of her toned physique in a bathroom mirror selfie (below). Stripping off her white wool and silk blazer, the 37-year-old Keeping Up with the Kardashians star struck a pose in nothing more than her white LFrank Lingerie 'Gaia' bralette and high-waist white pants, channeling the winking, tongue-out iPhone emoji. With her hair flowing on one side and one hand tucked in her pocket, she winked an eye and stuck her tongue out for the snap, captioning it with the emoji for emphasis. This Is What Kourtney and Khloé Kardashian Eat on Their Cheat Day The mom of three hit the Upfront with her sister Khloé Kardashian Monday, with both showing off their fit figures in body-hugging numbers. Their outfits didn't stop them from indulging in a cheat meal before they headed to the event, though. Kourtney shared a photo of the duo chowing down on fare from Popeye's Louisiana Chicken on their way there in a private jet. "Popeyes on the PJ. #cheatday," Kourtney captioned the photo. From the looks of Kourtney's midriff-baring selfie, it's safe to say that fried chicken meal was well deserved.