Kourtney Kardashian's body is so fierce, she has people saying, "I can't believe it's not silicone!" Believe it or not, the eldest Kardashian sister is all natural, and her crazy-hot figure has us convinced that 39 is the new 29. Ever since Kourtney started dating 24-year-old model Younes Bendjima, she's seemingly purged her wardrobe of anything but bikinis (except, of course, her trademark plunge-neck pantsuits), and we're definitely not opposed. Here are just 100 of the sexiest photos of Kourtney — get ready for some major curves ahead.