Kourtney Kardashian in black halterneck jumpsuit at Cosmopolitan 50th birthday celebration

WHO: Kourtney Kardashian at Cosmopolitan 50th birthday celebration in West Hollywood on October 11 2015

WHAT SHE WORE: Kourtney wore black halterneck jumpsuit from Balmain

BUY:

JUMPSUIT: BALMAIN PLEATED STRETCH JERSEY HALTERNECK JUMPSUIT at Net-a-Porter at Selfridges