Mary-Kate and Ashley know there's only room for one Prom Princess at White Oak - so who will it be?

Ashley really wants to be the Prom Princess, and things are going well - she has the most votes out of anyone! But then the piece of paper that proves it goes mysteriously missing... Mary-Kate and Ashley accuse nasty Dana Woletsky of stealing it, but it turns out they're wrong. There's only one way to make it up to Dana: they have to help her win the competition. It sure won't be easy getting their worst enemy voted Prom Princess!