Take a ribbon and put around the ponytail part of the hair.
Then make large ringlets out of the hair that is left down.
The picture below is a the side of her hair
After the hair is in a ponytail then very last don't pull the hair all the way through and leave the ends still in the ponytail.
Because of how thin and fine her hair is I only did 4 pull thrus across the front of her head.
Below shows one of these
She wanted me to take a full body picture so she could pose.
Below a picture from the left side of her head