Roar

Sixteen-year-old Olivia Wise has recently gone viral on the internet after she posted a video of her covering Katy Perry's 'Roar.' Olivia suffers from an untreatable brain tumor that was discovered when she had a seizure last year.     Once the video started going viral, it eventually reached Katy Perry herself, & she was so moved by the young girl, she actually sent her a personal message.