With our favorite style setters spending the week taking in the Fall collections in Paris, you can rest assured that the resulting looks are appropriately chic. The best-dressed crowd at Paris Fashion Week includes a Givenchy-clad Nicole Richie in an impeccable play on Spring's black and white trend and Jessica Alba in a party-perfect Valentino dress. Elsewhere, we were treated to sweet looks from Emmy Rossum and Rachel Weisz, who made the rounds in their respective ladylike dresses. For the rest of this week's best dressed, you'll have to keep clicking.