Kim And Kourtney Kardashian Bring Out Their Inner Vamps On Instagram For 'Chill' Saturday

Following Kylie Jenner's 18th birthday celebrations, Kim and Kourtney Kardashian had fun playing dress-up on their "chill sister Saturday."  The "Keeping Up with the Kardashians" stars posted matching photos on their Instagram accounts in which they're wearing skin-tight black latex dresses, sporting Bettie Page-style baby bangs and glamour waves.  Kourtney's ensemble consisted of a crystal-encrusted bra top over a black dress, while Kim's featured a daringly low neckline (her favorite). Bot...