This weekend the world's top style movers and shakers joined Tinseltown's A-listers for the Metropolitan Museum's annual Costume Institute Gala. The event, co-chaired by Anna Wintour, Giorgio Armani, Julia Roberts and George Clooney, had an extraordinary superhero theme and attendees got into the spirit of the evening with varying degrees of daring. Topping the list is Christina Ricci in Givenchy, whose distinctly Jessica Rabbit-esque superhero alter-ego could well be the ultimate fantasy for teenage boys round the world.