The 39-year-old reality television star — whose niece Penelope Disick celebrated her 11th birthday this weekend — used the app’s Stories feature to showcase her trim figure.
During a workout session the mother-of-two, who shares daughter True, five, and son Tatum, 11 months, with ex Tristan Thompson, flexed her washboard abs as she tugged at her leggings.
The Good American co-founder was dressed in a dark sports bra and coordinating bottoms. As she stood posing in a wall-size mirror, she blasted Beyonce’s 2013 hit Drunk in Love.
