As the holiday season swiftly rolls in, so does your anxiety. Obligating yourself to a million parties means you might have to hit more than one a night (you poor thing), so wearing something light enough to run around in but warm enough to go sans jacket is essential. That's where Costume Dept.'s Autumn/Winter 2010 collection of versatile partywear steps in. The cleverly constructed garments are designed to adapt to your mood and climate, with the help of wide necklines and ruched fabric. I love the black skirt/dress that can be worn as a maxi dress, mini, or pencil skirt—I'd wear it short to a party and long on the ride home. I'm also eyeing the long-sleeved dress/hood in both gray and black that can be worn hooded, off the shoulders, as a cowl neck, and even over your face (things get weird after a few drinks).

You know what all this means, don't you? Investing in even one of these pieces will give you four different looks for four different events! One less thing to worry about. Shop the complete collection here.