Kristen Bell Surprises Cancer Patient With Voicemail As Frozen Character [VIDEO]

I dare you not to tear up during this video!  Kristen Bell jumped back into her role as Princess Anna of Arendelle to surprise 6 year old Avery.

Avery's been battling cancer with an inoperable brain tumor.  Her reaction listening to "Anna's" voicemail is just about the cutest thing I've ever seen!