Kylie Jenner perfects "Bikini" Butt & Ass in the pool

Referring to a picture which showed Kylie Jenner swimming along the top of the pool, with a very blurry Kim seen swimming underneath, Kim wrote on Twitter: 'Way to blur me out @kylieejennerr!'
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Double trouble: In this shot, Kim's sister Kylie Jenner is totally in focus while a blurry Kim can be seen on the bottom of the pool (Read more and See more pictures)