Popsugar Fashion Celebrity Fashion Kourtney Kardashian's Black Bikini October 2018 SOS, Kourtney Kardashian's Cheeky Bikini Has Us Sweating in Our Turtlenecks 17 October 2018 by Victoria Messina View this post on Instagram A post shared by Kourtney Kardashian (@kourtneykardash) on Oct 16, 2018 at 12:39pm PDT As POPSUGAR editors, we independently select and write about stuff we love and think you'll like too. If you buy a product we have recommended, we may receive affiliate commission, which in turn supports our work. As a resident of New York City, I'm in full-on Fall mode. Flannel shirts are back in my weekly outfit rotation, my puffy coats are now hanging in my closet rather than shoved under my bed, and I'm slowly but surely transitioning to ordering hot cappuccinos in place of my usual iced coffee. Meanwhile, over in California, Kourtney Kardashian is still in Summer mode, soaking up the sun and gallivanting about in nothing but a bikini. I may or may not be just a teensy bit green with envy. The 39-year-old reality star had me dreaming of warmer days when she shared a series of Instagram photos that further proved she's the queen of bikinigrams. In the pictures, Kourtney is jumping for joy while wearing an itty-bitty black bikini and matching sunglasses. At first, her swimwear looked simple and classic, but then I caught a glimpse of her cheeky string bottoms and instantly started feeling a little hot under the collar. Does she know how to rock the hell out of a bathing suit or what?! Scroll through Kourtney's gallery of Instagram photos ahead to admire just how darn cheeky her bikini bottoms really are, and then keep reading to shop similarly sexy swimsuit styles for yourself. View this post on Instagram A post shared by Kourtney Kardashian (@kourtneykardash) on Oct 16, 2018 at 12:39pm PDT Shop Similar Black Bikinis Image Source: shopbop.com Kaloko Bikini Top ($112) and Valencia Bikini Bottoms ($112) Kaloko Bikini Top $112 from shopbop.com Buy Now Valencia Bikini Bottoms $112 from shopbop.com Buy Now Vitamin A Moss Top and California High Leg Bottom Image Source: revolve.com Vitamin A Moss Top ($110) and California High Leg Bottom ($96) Vitamin A Moss Top $110 from revolve.com Buy Now California High Leg Bottom $96 from revolve.com Buy Now Xhilaration String Bikini Image Source: target.com Xhilaration Triangle Bikini Top ($7, originally $15) and String Bikini Bottom ($10, originally $15) Xhilaration Triangle Bikini Top $7 from target.com Buy Now String Bikini Bottom $10 from target.com Buy Now PilyQ Isla Triangle Bikini Top and Basic Ruched Bikini Bottoms Image Source: shopbop.com PilyQ Isla Triangle Bikini Top ($79) and Basic Ruched Bikini Bottoms ($66) PilyQ Isla Triangle Bikini Top $79 from shopbop.com Buy Now Basic Ruched Bikini Bottoms $66 from shopbop.com Buy Now Amazon Triangle Bikini Set Image Source: amazon.com Amazon Triangle Bikini Set ($18-21) Amazon Triangle Bikini Set $18-21 from amazon.com Buy Now Swimsuits For All Beach Babe Black Side-Tie Bikini Image Source: swimsuitsforall.com Swimsuits For All Beach Babe Black Side-Tie Bikini ($46, originally $66) Swimsuits For All Beach Babe Black Side-Tie Bikini $46 from swimsuitsforall.com Buy Now Shekini Triangle Bikini Image Source: amazon.com Shekini Triangle Bikini ($20) Shekini Triangle Bikini $20 from amazon.com Buy Now Celebrity FashionBikinisShoppingShoppableCelebrity Bikini PicturesCelebrity InstagramsFashion InstagramsGet The LookFallFall Fashion