hailey bieber shows off her toned midriff in a crop top and flared leggings while attending her pilates class in west hollywood, california-101022_18

Hailey Bieber flaunts her toned midriff while attending a Pilates class in West Hollywood, California

Hailey Bieber flaunts her toned midriff while attending a Pilates class in West Hollywood, California

Hailey Bieber shows off her toned midriff in a black crop top while visiting an office

Hailey Bieber shows off her toned midriff in a crop top and flared leggings while attending her Pilates class in West Hollywood, California

Kendall Jenner and Hailey Bieber showcase their runway figures in leggings as they arrive to Pilates

Hailey Bieber flaunts her toned midriff while attending a Pilates class in West Hollywood, California

Hailey Bieber Did Pilates in the Flattering Leggings Style Hollywood Loves — but With a Twist

Hailey Bieber Shows Off Abs in One-Shoulder Sports Bra

Hailey Bieber flashes her bare belly in a crop top and low-slung pants after church service in Beverly Hills

Hailey Bieber wears pink Leggings Arriving @ Forma Pilates Class In Los Angeles

Kendall Jenner and Hailey Bieber showcase their runway figures in leggings as they arrive to Pilates