Kristen Bell calls sick little girl as Princess Anna from ‘Frozen’

SAN DIEGO (KUSI) – "Frozen" star Kristen Bell called a 6-year-old who is battling an inoperable brain tumor and left her a message as Princess Anna.

Avery Huffman is suffering from a brain tumor called diffuse intrinsic pontine glioma (DIPG). 

The message from Princess Anna crowned Avery the queen of Arendelle for the day.