Girls Costumes & Girls Halloween Costumes. Sugar, spice, everything nice, it's what little girls are made of. But you'll need more than that for your perfect girls Halloween costumes. From Ariel the Little Mermaid to Belle from Beauty and the Beast to Snow White and Jasmine from Aladdin, you and your friends can rule your neighborhood kingdoms in beautiful gowns, gorgeous hair, and dainty girls costume shoes. We have all sorts of cute and precocious girls costume ideas. So tap your ruby red shoes together, flip your long hair down the tower, dance until your chariot turns back into a pumpkin and see what magical girls Halloween costumes come your way this year.