Hailey Bieber. Courtesy of Hailey Bieber/Instagram Hailey Bieber never misses an opportunity to flex. Bieber, 28, showed off her abs via Instagram ahead of her Fila x Hailey collab launch party on Tuesday, February 25. In the mirror selfie, she flexed her toned body while rocking a Fila hoodie featuring a fitted bodice, baggy sleeves…
