Dwayne "The Rock" Johnson Sings Moana To 3yr. Old Fan Battling Cancer

Dwayne "The Rock" Johnson loves sending messages to his fans. 

The actor posted a video on Instagram yesterday sharing the story of Hyrum Harris, who has been diagnosed with acute lymphoblastic leukemia which is complicated by Down Syndrome. He voiced the character of Maui the demigod in the 2016 Disney movie.