Kendall and Kylie Jenner Show Off Their Killer Bikini Bodies

Kylie Jenner, Kendall Jenner
Kendall and Kylie Jenner attended the 2015 American Music Awards Nov. 22. Jason Merritt/Getty Images

Working it in the winter! Kendall and Kylie Jenner showed off their killer bikini bodies in an Instagram snap Saturday, January 9.

Supermodel Kendall, 20, and her sister, 18, posed for a selfie that Kylie shared on her Instagram account, showing the siblings' sexy stomachs.

Lipstick maven Kylie followed it up with another pic Sunday, January 10, that showed her with a new hair color.

"I look like Kylie Jenner tonight," the reality star captioned the pic that showed with her long, flowing, metallic-silver hair, posing alongside a friend.

The new hair color is a stark contrast to the Keeping Up With the Kardashians star's casual look on Friday, January 8, when she had dinner with girlfriends in Calabasas, California.

A post shared by Kylie (@kyliejenner) on

Kylie wore minimal makeup, a black bomber jacket and black gym shoes, after Us Weekly exclusively revealed earlier that day that her off-again, on-again boyfriend, Tyga, had cheated on her with Brazilian model Annalu Cardoso.

I look like Kylie Jenner tonight

A post shared by Kylie (@kyliejenner) on

The "Stimulated" rapper, 26, and model, 23, met on the set of one of his video shoots. She also later appeared on his MTV2 show, Kingin' With Tyga.

Kylie and Tyga began dating in August 2014, after he threw her a 17th birthday bash. However, a source also confirmed that Tyga and Cardoso began dating in December that same year.

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