Khloé the sexiest Kardashian attends the Cosmopolitan bash with the other Kardashians in leggy black gown

With her supermodel half-sister Kendall Jenner in England, Khloé was undoubtedly the sexiest Kardashian at Monday night's Cosmopolitan 50th Birthday Celebration in West Hollywood. The 31-year-old reality star showcased her cleavage in a black plunging top tucked into a high-waisted skirt, featuring a thigh-high slit. The 5ft10in presenter finished off her vampy ensemble with nude,