This dress was absolutely stunning on the Spring Cavalli runway so it's no surprise Hollywood's youth are all over it, or rather, all in it. Mischa wore a heavier floral version with a hippie headband at Cannes in May, Juliette Lewis standing by. And Lauren Conrad wore hers on the beach for The Hills premiere party. The big difference is the hair styles, other than that the elegant boho dress suits both laid-back attitudes. You tell me — who wore it better?