We’ve picked our Fashion A-List this week! Out of every outfit we spotted a celebrity wearing in the past few days, these five romantic looks topped our list of favorites to score top spots in our Look of the Day section—Nicole Kidman (in Oscar de la Renta), Marion Cotillard (in Christian Dior), Olivia Palermo (in a CH Carolina Herrera blazer and tangerine Olivia + Joy clutch), Blake Lively (in Roland Mouret), and Eva Mendes (in Prada). Now that we've told you our faves, tell us yours by making your own with InStyle.com's new A-list tool. Just pick your 5 favorite looks out of our favorite ensembles this week; then share your picks with your fashion-savvy friends on Facebook and Twitter. Head to the A-list maker right now to get started!