Each year, on the eve of New York Fashion Week, the industry's biggest A-listers gather together to honor individuals who have made outstanding contributions to the fight against AIDS. Members of the fashion world's upper echelon don their very best designer-clad looks for the evening's festivities. Considering that amfAR's New York Gala is the official kick off to February's NYFW, it's no surprise that our fashion favorites, from Sarah Jessica Parker to Carine Roitfeld, show up ready to impress. In honor of tonight's 2013 gala, honoring Kenneth Cole, Janet Jackson and Heidi Klum, click through for some of our favorite looks from amfAR Galas passed.