Kylie Jenner Poses in Sports Bra and Tiny Shorts For 'Fierce' New Puma Ad

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Photo: Puma
Turns out, Kylie Jenner's sporty side is also sexy.
In a new ad for Puma, the 18-year-old reality star shows off her fit physique   in a pair of tiny shorts and a sports bra. "Flex your fierce side," she said of the image.

In February, Kylie reportedly signed a seven-figure deal to model for the brand's Spring/Summer women's training campaign, out April 1, despite her brother-in-law, Kanye West, insisting that she was not interested in the job. "1000% there will never be a Kylie Puma anything," he tweeted a few days prior to Puma's announcement. "That's on my family! 1000% Kylie is on Yeezy team!!!"

West works with Puma's competitor, Adidas.
The Keeping Up With the Kardashians star recently opened up to ET about the advice she and her sisters received from momager, Kris Jenner, in regard to becoming a "great businesswomen."
"Be nice to everybody, and just behave well," Kylie said of her mom's advice. "Do what you love. I like to do stuff that I'm passionate about and believe in."