Stefani offers a lesson in French dressing at Cannes's amfAR dinner in France. Plus: Pippa Middleton, Ashton Kutcher, Cameron Diaz and more


Kelly Bensimon takes a break from writing her "hot" new book Wednesday to hang with Real Housewives of New York costars Jill Zarin and LuAnn de Lesseps at a party celebrating her new column in AM New York newspaper.