( CNN ) -- Olivia Wise , a teenager who refused to let an inoperable brain tumor kill her spirit , died Monday . Olivia gained fame in the last weeks of her 16-year-long life when a Katy Perry song she recorded in a Toronto studio in September became a viral hit online . `` She died peacefully in her home surrounded by the extraordinary love of her family , '' a family statement sent to CNN said . The teenager said that she did n't want people crying at her funeral , but that they should celebrate her life , her mother wrote in a letter to CNN . Her version of Perry 's hit `` Roar , '' which she recorded in September after learning there were no more treatments available , drew the attention of Perry after it was published on YouTube in October . `` I was very moved and you sounded great , '' Perry told her in a video posted on YouTube . `` I love you . A lot of people love you and that 's why your video got to me . It moved everybody that saw it . '' Perry concluded with : `` Keep roaring ! '' The international attention drew more than a million viewers to Olivia 's song and helped raise $ 77,000 for the Liv Wise Fund that was started in her name in support of brain tumor research . The video shows OIivia sitting in a wheelchair in the middle of the studio , singing softly at first and struggling with her breaths . `` 'Cause I am a champion , and you 're gon na hear me roar . '' Her energy grows and she smiles as she sings `` I got the eye of a tiger , a fighter , dancing through the fire . '' `` Olivia is a fighter and has gone through the fire , '' her cousin wrote in the post under the video posting on YouTube . `` In fact , she was going through the fire while she recorded this song , but you would n't know it , because she was dancing right through it . '' Her family posted another song video on YouTube just days before Olivia 's death . She wrote `` Simple Girl '' -- a song about how she wanted to live life -- when she was 11 . The only time she sang it was on September 6 , during the same session in which she recorded `` Roar . '' Teen featured in viral video dies . `` In many ways , Olivia has lived a shortened , but full life , '' her mother wrote in the letter to CNN . Wise was diagnosed with a very aggressive form of brain cancer in January 2012 after she suffered a seizure . She rarely complained about the grave prognosis , her mother said . `` Every day , she wished for a cure , and rarely succumbed to negative thoughts . '' `` To tell the truth , her diagnosis did n't change her personality , '' her mom said . `` It only enhanced it . She took the news in a mature , reasonable , responsible way . ... Even in the most difficult moments , she managed to bring laughter and friendship to all that were caring for her . '' Visit The Liv Wise Fund . CNN 's AnneClaire Stapleton contributed to this report .
Olivia Wise 's recording of 'Roar ' became a viral online hit in October . The 16-year-old was diagnosed last year with terminal brain cancer . `` She died peacefully in her home '' Monday , her family says . The family released another song by Olivia called `` Simple Girl ''