Kim and Kourtney Kardashian looked ready for a costume party after playing dress up on Saturday night. Naturally, the sisters shared the result in a photo they both posted to Instagram. "Just a chill sister Saturday," Kourtney wrote in her caption. Kim went with a more descriptive message, writing, "Banger sisters." Perhaps that's because both ladies have transformed, thanks to dark makeup and dark black wigs featuring short bangs. The gothic look was completed with black latex ensembles that put plenty of skin in focus. It's just the latest cleavage-baring picture the ladies have posted this week. On Saturday, Kim thanked her Instagram followers with a new selfie, and on Thursday, newly single Kourtney flaunted her physique in a bikini shot.