Nicole Richie is the September guest editor for Who What Wear.The designer picked her must-have fashion and beauty staples for this fall.Paul and Joe Folies Dress ($4300, 310.270.4620)Leave it to Richie to find the perfect party dress! The green and white sequined swirls on the Folies Dress—which is part of the limited "Pierre Cardin pour Paul & Joe" collection—instantly puts us in a festive mood