Cinderella was on our 11/23 Western. She's my DD8's favorite too. If you've never been to the Princess Bkfast at WDW, you should do it before your DD gets too cool for it. We took DD when she was 5, and she was captivated. She told Cinderella "I dream about you sometimes, I love you." It brought tears to all our eyes, including the CMs playing Cinderella and the Godmother.
ps: The way we got in was suggested to me by the CM on the phone. Make a ressie for the breakfast with Pooh at Crystal Palace right near the castle. Go 45 minutes or so early, and head up to the castle. There are almost always a couple of no-shows, and if your party is small (we are 3), they may be able to accomodate you. If not, worst case is you have breakfast with Pooh. It worked for us like a charm, and we were there over the Milennium New Years so the place was a zoo!