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Kendall and Kylie Jenner Show Off Bikini Bodies in St. Barts, Party on a Boat with Khloe and Kourtney

Kylie Jenner and Kendall Jenner wear bikinis in St. Barts on August 18
Kylie Jenner and Kendall Jenner wear bikinis in St. Barts on Aug. 18

Showing off! Though the rest of the Kardashian clan landed in St. Barts on Aug. 16, Kylie Jenner arrived on Tuesday, Aug. 18, and the youngest of the Keeping Up With the Kardashians crew wasted no time in sharing yet another bikini pic with sister Kendall Jenner (who posted a similar shot on her account later) on Instagram. "We woke up in paradise too," she captioned the image. 

Related: PHOTOS: Kardashians' hot bikini bods

A photo posted by King Kylie (@kyliejenner) on Aug 18, 2015 at 8:58am PDT

The two posed provocatively in front of a mirror in revealing swimwear. Kendall, 19, flaunted her svelte model figure in an army-green two-piece from Montce Swimwear with a casual, floral cover-up by Zimmerman draped over her shoulders. 

A photo posted by Kendall Jenner (@kendalljenner) on Aug 18, 2015 at 10:54am PDT

Related: PHOTOS: Kylie through the years

Kylie—who had been celebrating her 18th birthday in L.A., Mexico, and Montreal before flying to join her family on the Caribbean island—chose to wear a black and white string bikini with mixed-metal bracelets, and mismatched gold necklaces. 

Related: PHOTOS: Celebs' scenic vacation photos

Later, the two sisters joined up with half-sisters Khloe and Kourtney Kardashian (and her son, Mason, 5) for a luxurious boat ride while filming upcoming episodes for their E! show in the luxury island destination. The whole party made sure to stay protected from the sun with Banana Boat SPF 30 sunscreen.

Related: PHOTOS: Celebs in bikinis

What do you think of Kendall and Kylie's risqué selfie? Tweet with @UsWeekly using the hashtag #stylebyUs!

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