Fashion's Night Out took over NYC with major shopping events taking place from SoHo to Uptown yesterday evening. We were with Mary-Kate and Ashley Olsen at their Elizabeth and James pop-up store while dozens of celebrities shopped around town for a good cause. Halle Berry returned from her romantic Paris getaway with Olivier Martinez to join Jessica Alba at the Ralph Lauren store while Victoria Beckham greeted fans at Bergdorf Goodman. Jennifer Lopez and Gwen Stefani promoted their latest fragrances during separate events and Diane Kruger signed autographs at Saks Fifth Avenue. You can still purchase your own FNO items now through Sept. 20 on PopSugar's Retail Therapy, 100% of the proceeds will go to FNO's official charity, the NYC AIDS Fund. So, tell us — which star was the best dressed last night at Fashion's Night Out?