Haylie and Hilary Duff in "Material Girls" HILARY AND HAYLIE DUFF GETTING MATERIAL FOR LIFE by Brad Balfour The Duff sisters – Hilary, 19, and Haylie, 21 – have had a remarkable run in showbiz so far for such young blossoming talents. Hilary's career kicked into high gear with the hit TV show, Lizzy McGuire, on The Disney Channel and has continued on with starring roles in film and a solo recording career. Older sister, Haylie, hasn't quite matched her younger sibling's high