Sister Halloween Costumes: The Kardashian-Jenner Sisters
What to wear: It depends on what era of Kim, Khloé, and Kourtney Kardashian and Kendall and Kylie Jenner's lives you want to be. If you want to portray their current incarnations, do tight-fitting clothes in bright colors for Kim; jeans for Khloé, in honor of Good American; and all black with a rock influence for Kourtney. For Kylie and Kendall, copy their Fashion Week outfits.
How to act: Obviously there's a lot of arguing, but ultimately, these five sisters love each other deeply.