Hilary Duff has great hair!!! It sounds like you're on the right track with long layers, just remember that the key to healthy looking hair that will hold a style is a great cut and regular maintenance (trim your locks every six weeks). If your hair is straight, to get full bodied waves like Hilary, you can use a large curling iron and spray your hair with hair spray (try Davines) to give it a natural look with added thickness.

