Kristen Bell leaves an amazing message as Princess Anna for sick girl

When you're sick, getting a message from a loved one can really lift your spirits.

A certain Princess from Arendelle knows just how much a few kind words can really make your day --- she took some time to call 6-year-old Avery Huffman who is battling for her life.

Actress Kristen Bell who voices Princess Anna in "Frozen" got into full character for the message, even telling Avery that she had to go because naturally she had plans to build a snow man. But, the best part, was when she crowned Avery and Honorary Princess of Arendelle.

Anna was right. Princess Avery has been very brave. Last month she was diagnosed with an inoperable brain tumor. Brandon Huffman, the father of Arendelle's latest princess, chronicles their journey online and says he's surprised to see his "Frozen" video go viral but can certainly understand why.

"Seeing it go viral and so many people sharing the same emotions I have when I watch it, I'm constantly reminded that while Avery is going through the worst possible fight anyone should have to, she's touching so many people's hearts and her fight and toughness is reaching so many people. I shouldn't be surprised, though, because she's been touching her mom and I's hearts since they day she was born."

To donate to Princess Avery's care you can visit here and follow the hashtags #AveryStrong and #BrAvery on Twitter.

Can't get enough of "Frozen?" Check out this Elsa look-alike: