Also in town, Duff's ex Joel Madden, who channels old-school De Niro (circa Taxi Driver) while he and new girlfriend Nicole Richie take in the Zac Posen runway show on Thursday. Later, the couple headed over to the Cellar Bar at the Bryant Park Hotel, where Madden played guest deejay.
Click here to see which other stars (Britney! Sienna! Joss!) came out for New York Fashion Week.