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...

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, leg-lengthening Louboutins and diamond jewelry.

Khloé wore her waist-length, blonde hair extensions slicked back as she posed with her family at the cocktail bar, Ysabel.

Unfortunately, Kardashian's make-up artist piled on an excess of false lashes, lipstick, and powder - making her complexion look uneven.

The half-Armenian stunner feels sexier than she ever has after years of being known as 'the fat, funny' Kardashian.