amfAR Gala New York Fashion Week Pictures

Fashion Week is officially here — our favorite insiders and models braved the snow last night to ring in the start of the week-long style frenzy at amfAR's New York Gala. It was a crowd dressed for the occasion; Karolina Kurkova in leg-baring Vionnet, Alexa Chung channeling her signature sweet-chic in white Louis Vuitton, and Joan Smalls slipping into a sexy peplum-adorned evening look were just a few of the A-listers who gathered to celebrate the start of NYFW at amfAR's annual benefit for AIDS research. Inside, more of the night's standouts show off their evening wear — click through to get a glimpse of all of the glamorous arrivals before they trade their gowns for Fashion Week-worthy street style.