Ciao Bella!Hailee Steinfeld is turning out to be quite the fashionista, striking a fierce pose in the first ad of her Miu Miu campaign in a black-and-white dress.The 14-year-old True Grit actress is the latest celebrity to star in the fashion house's ads, joining the likes of Katie Holmes, Evan Rachel Wood, Vanessa Paradis and Lindsay Lohan.While rumors first flew that Steinfeld would rep the bran