Hailey Bieber and Kendall Jenner were spotted at a Pilates class on Monday afternoon after spending New Year's weekend. #HaileyBieber #

Kendall Jenner and Hailey Bieber were spotted leaving a Pilates class together on Thursday. More pics on our site! #KendallJenner #Hailey

Kendall Jenner and her best friend Hailey Bieber are seen leaving a hot pilates class in LA

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

Hailey Bieber and best friend Kendall Jenner jump-start the holidays with a private Pilates session

April 7: Hailey Bieber and Kendall Jenner leaving their Pilates class in Los Angeles,Cali…

Kendall Jenner & Hailey Bieber Kick Off the New Year at Pilates Class: Photo 4686066, Hailey Baldwin, Hailey Bieber, Kendall Jenner Photos

Hailey Bieber & Kendall Jenner Meet Up for Afternoon Pilates Class: Photo 1336575, Hailey Bieber, Kendall Jenner Pictures

April 7: Hailey Bieber and Kendall Jenner leaving their Pilates class in Los Angeles,Cali…

Kendall Jenner & Hailey Bieber Kick Off the New Year at Pilates Class: Photo 4686054, Hailey Baldwin, Hailey Bieber, Kendall Jenner Photos

Kendall Jenner & Hailey Bieber Take a Monday Morning Pilates Class Together: Photo 4337350, Hailey Baldwin, Hailey Bieber, Kendall Jenner Photos

Kendall Jenner attends Pilates class and visits a hair salon with her BFF Hailey Bieber