This may be a controversial opinion, but Katy Perry's "Roar" is the greatest song ever written.
I know it's not Beethoven or whatever, but "Roar" is so full of energy, it's impossible to listen to it without feeling like you could KO Mike Tyson. If you don't agree with me now, you will after hearing Olivia Wise, a Toronto 16-year-old suffering from brain cancer, cover the song.
When family friends arranged for Olivia to come into the studio to record the cover, "She couldn't walk or stand, she didn't have her full breath or the energy she used to, and she was managing her new pains and new limitations. While her physical condition was rapidly fading, her spirit remained untouched," the video said.
Katy Perry responded to the lovely tribute with a response video of her own. "I love you, and a lot of people love you, and that's why your video got to me," she said. "Thank you so much. Keep roaring."
"Roar" has become something of an anthem for young cancer patients of late: Kids, parents, doctors and staff at a New Hampshire children’s hospital created this inspirational music video using "Roar" that is sure to leave you a little choked up.