Bejeweled, Bedazzled and Branded
P.S. If you have previously worn prom or other special occasion dresses, consider giving them to DonateMyDress.org. The site offers a directory of places to donate dresses in your area. It's an easy way to clear some closet space and give another girl a night to remember.
P.P.S. If you want to see a truly original prom dress, take a look at this video of a mom who weaved a dress for her daughter from Starburst wrappers.