Courtesy of the Children's Hospital at Dartmouth-Hitchcock: The Best Music Video for Katy Perry's "Roar" You'll See All Day

Recently, the patients and staff of the Children's Hospital at Dartmouth-Hichcock got together to say thank you to all the participants of the annual CHaD HERO Half Marathon & Ripcord 5K. How did they decide to say thanks? With a little help from Katy Perry's song "Roar," they decided to put their dancing skills to use in a video-thank you card. Check out their great work below!