Choo choo. Ask Ashley Greene and Anna Kendrick: A dress with a train is a nightlong commitment... to strangers stepping on the garment you shelled out big bucks for. However, it also makes for a memorable look. Ashley Greene sparkled at the 2011 Met Gala in a nude and sequined number by Donna Karan. Anna Kendrick chose a more playful polka-dotted dress by Elie Saab. But which one was more worth the hassle?