You lost a lot on prom night. The corsage was gone before you even reached the dance floor, and your updo came undone before pictures. And then there was, uhm, never mind. One thing you held on to: your dress. And now you can lose that too for a good cause. The just-launched site DonateMyDress.org lists gown drives across the country, so you can find out where to ditch yours (and ditto for those looking to find one). Bridesmaid and special occasion frocks also fit the bill. While you’re there, check out the heartwarming photos of happy gals in their prom garb, read letters from those you’ll be helping out, and find out how to become a mentor if you’ve got the time. After all, it’s just like you to give it up. Available online at donatemydress.org.