What to wear: If you don't have long, brown hair, get yourself a long, brown wig, and pin it back on both sides of your head. Then, pair it with a cutesy striped sweater or button-down (buttoned all the way up, naturally), and a high-waisted skirt or jeans. If you go for a skirt, make sure you wear it with white tights and flats. Keep in mind Nancy's cool accessories, which include her homework, notebooks, and a bat.