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New Pics: Kendall Jenner, 14, Models a String Bikini

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The Kardashian sisters Twittered new sexy pics of their 14-year-old half sister Kendall Jenner Thursday afternoon.

In one photo, Kendall wears a miniskirt, thigh-high stockings and high heels. In another, she dons a string bikini, mesh cover-up and heavy eye makeup.

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"All I can say is wow!" writes Kourtney, 31, of the snaps, taken by Nick Saglimbeni. "I am speechless. She looks amazing!! So proud of you, Kendall."

Kim is equally thrilled for her little sis, who has also appeared in ads for Forever 21.

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"I am so proud of Kendall. She's going to take over the modeling world… you just watch!" she wrote earlier this week alongside photos of Kendall posing in a barely-there bikini.

Under a photo of Jenner showing off cleavage, Khloe writes, "In my head, Kendall is still my adorable 2-year-old sister whose diaper needs changing," writes Khloe. "LOL…when did she turn into a supermodel?!"

VIDEO: Kourtney and Khloe get in an ugly catfight readers are mixed on if Kris and Bruce Jenner's daughter is too young to show off so much skin. In a close poll of about 35,000 readers, 53 percent defended the teen's decision to show her bikini bod.

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