It makes sense that Maria Bello (and a host of other celebs attending Dior Sponsors the Solomon R. Guggenheim Museum's Young Collectors Council Artist's Ball Honoring Matthew Ritchie event at the Guggenheim Museum in New York City on December 16, 2004 chose to wear Christian Dior. Here Bello channels the 60s in a vibrant lime green silk chiffon overlay with ruffled bottom and bell sleeves over a mini slip dress.