I've seen it a few days ago and thought I should share with you and post it but never found the time to do it... so... here is a very nice video reference made by Disney's animator - Bobby Pontillas.
I remember watching his wonderful work while he was still a student at AM, and loving it.
I really love the way he's thinking who is the character he needs to animate, what it feels and how it should react, giving it the body language and gestures of a little girl (and I won't be surprised to know he watched his niece or daughter to get some ideas :)
Enjoy his work!
Frozen- Shot Progression from Bobby Pontillas on Vimeo.