Derek Lam's Fall 2011 collection was one of our favorites this Mercedes-Benz Fashion Week and Wednesday morning he gave us another treat. The designer presented his limited edition dress collection, Derek Lam + eBay . Comprised of 16 looks, the range includes colorful crisp shirt dresses and more formal gowns; but not all of the dresses will be available for purchase. Starting today you can visit dereklam.ebay.com and vote for your favorite styles. The top five most popular designs will be announced March 1, 2011 and will be available for purchase in May 2011. Vote now!