The query "hilary duff why not" refers to the song "Why Not" by Hilary Duff. "Why Not" is a song recorded by American actress and singer Hilary Duff, written by Charlie Midnight and Matthew Gerrard, and released on March 21, 2003, as the first single from "The Lizzie McGuire Movie" soundtrack. The song also appears in different versions on her 2003 album "Metamorphosis" and her 2005 compilation "Most Wanted." The music video was directed by Elliott Lester and shot in downtown Los Angeles, featuring Hilary Duff performing on a rooftop, with scenes of street dancing and crowds. The song gained notable chart success internationally and was part of Hilary Duff's early music career. The lyrics encourage taking chances and being bold, reflected in the chorus "Why not take a crazy chance? Why not do a crazy dance?"