The Kardashian-Jenner clan is always changing up their looks [1], but one sister who's managed to look pretty much the same since she first burst onto the scene is Kourtney. The mother of three [2] will be ringing in her 39th birthday on April 18 (I know, we can't believe it either!), but if we didn't know any better, we'd say she's taken a cue from Jennifer Lopez [3] and is aging backward. Seriously, did you see her recent bikini snaps [4] in Turks and Caicos? Regardless of how you feel about the Kardashians, I think we can all agree that Kourtney looks damn good!

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