Of all the party dresses you need this season, your NYE outfit is the most important one of the year (in 2012, anyway). It's your last chance to wrap up all those loose ends with the boys of 2012, and time to pull out all the stops for the new year. This is the only night you don't need to worry about falling into a sequin dilemma or getting a metallic migraine, because well, it's NYE, and it's all about pulling off the flashy look. Here's the ultimate NYE dress guide to help you start the new year off with style and class (we hope).