Wand Ambition: Emma Watson, much like her witchy "Harry Potter" character Hermione Granger, is smart, wholesome and sensible (or, as she puts it, "a proper nerd"). Which might explain why she was drawn to the edginess of this deconstructed black-and-blue Rodarte creation, with its haphazard layers of tatty mesh and netting that make her look like she just took on the entire population of Slytherin in a game of Exploding Snap. But avant-garde couture, especially when it comes pre-shredded across the bust, requires an attitude that struts the line between bold and brash, and the winsome teen, who may as well have Miss Congeniality emblazoned on her sash, is just too darn sweet to pull it off. Which is what we suggest she do with this frock. Pronto. Besides, we hear that Hogwarts has some delightful black robes that are all the rage with nerds, proper or not.