Kendall Jenner & Hailey Baldwin Show Off Their Abs While Spending Time with Justin Bieber & Chris Brown

Kendall Jenner dons spandex pants while heading home after working on her fitness on Monday afternoon (December 15) in Calabasas, Calif.

That same day, the 19-year-old model’s sister Kylie traveled to a meeting in the same neighborhood.

The day before, Kendall was spotted making her way through LAX Airport after hanging out with her good pals Hailey Baldwin, Justin Bieber, and Chris Brown in Washington at the latter’s show.

“twinning and we didn’t even have to try,” Kendall captioned an Instagram photo with Hailey, in the same place Justin posted his choking pic with Chris.

35+ pictures inside of Kendall and Kylie Jenner out and about separately…