10/30/2013 11:35 EDT | Updated 10/30/2013 11:36 EDT

Katy Perry Responds To Olivia Wise, Toronto Teen With Brain Cancer Who Sang 'Roar'

Katy Perry has perhaps seen a myriad of people covering her song "Roar," but few seemed to touch her more than a young Toronto girl named Olivia Wise who is battling brain cancer.

Wise recorded herself singing Perry's "Roar" on September 6 of this year. The YouTube clip (enbedded below) showing Wise in a recording studio performing the song was posted on Oct. 14 and has garnered over 150,000 hits thus far. "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," the description says. "While her physical condition was rapidly fading, her spirit remained untouched."

This week, Perry responded via YouTube to Wise's rendition.

"Hey Olivia, it's Katy Perry here," the singer says to start. "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 your wish to record that song, I thought that was really cool. I love you and a lot of people love you and that's why your video got to me and 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."

The Liv Wise Fund has been established in support of brain tumor research. So far the fund has raised $12,574.76 with a goal of $50,000. "Olivia is a fighter!" The fund's page says. "So Brave, So Courageous! She is our Inspiration, our HERO!!"

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