Hollywood Studios has the Frozen Sing Along.
I was not sure about it until I saw it, then it went to my must do list. It is a Tier 1 attraction. I suggest Fastpass to get earlier entrance into theater. It gives a history of Frozen so you learn but also get to sing, don’t worry they provide the words for you.
Here’s a secret for you-it snows or should I say Elsa makes it snow”)