This is Sissy's (Eliza Dushku) stunt costume worn during the fight scene with Justice.
The costume consists of a gray pair of snake skin patterned pants, bedazzled belt, black halter top and white sweater with a hole in the back for the wire to attach to the harness the stunt actress was wearing. It was worn for the scene where Justice kicks Sissy and Sissy goes flying up and backward to land in between Missy and Chrissy

COA: Propworks