KENDALL JENNER

They may not share the same last name, but a penchant for self-made celebrity must run in both Kim Kardashian and Kendall Jenner's blood. Jenner, who is Kim's younger half-sister, posted a photo of herself in a bikini late Monday night, with the caption: "Miss summer!" The aspiring model, 16, currently has a contract with Australian swimwear designer Leah Madden, and was formerly the face of a Forever 21 campaign. Kim and sisters Kourtney and Khloe are no strangers to the Twitter spotlight, frequently releasing racy shots of themselves on the social media site.