Credit: Enrique RC, PacificCoastNews.com Photo: Kyle Massey and Sabrina Bryan in NYC on July 30, 2012

We already know who the twelve contestants will be on Dancing With the Stars Season 15 All-Stars, but what's keeping us up at night is that unknown 13th dancer. Will it be That's So Raven's Kyle Massey, The Cheetah Girls' Sabrina Bryan, or Queer Eye for the Straight Guy's Carson Kressley?

While we won't officially know until voting ends in late August, the potential contestants hit up Good Morning America in NYC yesterday (July 30), campaigning for their chance to be on the show — pressure's on, guys!

But even though they're competing with each other to get back into that ballroom, it looks like Disney stars Sabrina and Kyle are still pretty chummy. Who do you want to see back on the show? Learn how to vote for your favorite potential contestant here!

Dancing With the Stars Season 15: All-Stars will premiere on Monday, September 24 at 8 p.m. ET/PT on ABC.

Follow Alissa Kombert on Twitter @AyeKayArt.

Dancing With the Stars airs Mondays and Tuesdays on ABC.