The King & Queen of Pop Sing-Along: Michael Jackson and Madonna

Not only will the crowd be warbling along to the music of the iconic hit machines (both born in August of 1958, fact fans), but revelers will also take part in costume contests, "vogue-offs" and more. Dress up in your Madge or Mike gear—or alternately, your best prom wear—for a chance to be named king or queen of the sing-along.