Pop star Katy Perry has offered her condolences following the death of a 16-year-old Jewish girl whose cover of “Roar” became an Internet hit.

Cancer patient Olivia Wise became an online sensation earlier this year after a recording of her singing Perry’s popular track hit the web, and the pop star was so moved, she recorded a special video message for the teen.

Wise, who was suffering from a brain tumor, passed away on Monday, and Perry was quick to remember the youngster for her bravery.

In a post on her Twitter page, she wrote, “Olivia Wise, I can hear you singing with the angels now. Your spirit & strength has inspired me & so many others… May you rest in peace.”