Another week, another city. It may have just been New York Fashion Week, but London is already buzzing with the hottest designs to happen across the pond, and, unsurprisingly, some of our favorite celebrities are there to help celebrate - in the front row, no less. Cue Olivia Palermo's never-ending street style savviness, Alexa Chung loving leopard print, and Anna Kendrick debuting one of the sexiest LBDs we've spied in a long time . . . and that's just to name a few. See them all right here, in the gallery.