Follow this video to learn how to do an innovative and cute hairstyle to your American Girl doll. The first thing you have to do is to brush the doll's hair well. Then split the hair in two parts by parting it. Tie the upper part in a ponytail using a hair band. Afterwards tie the lower part into another ponytail using another hair band. Make sure to brush the hair well each time. Spread out the upper ponytail in a way that it almost hides beneath it the lower ponytail. You will have made a double decker ponytail to your doll.