For the hairstyle: Part out a square on top of her head first. Then part out a section in front and add the first elastic. Add the hair from the first section all the way back. Easy and quick! We added 2 sidewinders (mixing pink and clear) to the ponytail after.
My only complaint is: We have had a hard time keeping the sidewinders in without them sliding out. (I'm guessing this is because The Princesses hair is so smooth and straight.) Our solution has been putting an elastic at the bottom of the sidewinder, which works great.