Katy Perry has a message for Olivia Wise: Keep roaring.
The pop superstar posted a video response to the ailing Toronto teen, who's battling brain cancer, complimenting Olivia on her recording of Perry's hit, "Roar," which has since gone viral, and sending her "love and light."
"I just wanted to reach back out to you and tell you that I saw your video and I was very moved, and you sounded great for being in the studio and making it your wish to record that song. I thought that was really cool," the "Firework" singer said.
She continued: "I love you and a lot of people love you, and that's why your video got to me and moved everybody that saw it. So I just wanted to send you some love and some light and tell you that I'm thinking about you. Thank you so much. Keep roaring."