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

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

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

Hailey Bieber sports all grey crop top, jacket, and leggings as she leaves a Pilates class

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

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

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

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

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

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

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

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

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