The 65-year-old singer was so touched by the story of four-year-old Morrison, who is battling neuroblastoma, a rare and aggressive cancer of the nervous system, reported Daily Telegraph.
"A beautiful version of Elton and Bernie (Taupin)'s song 'Tiny Dancer' has been recorded in Ireland as a way to raise money for the care of Lily-Mae Morrison, a four year-old Irish girl who has neuroblastoma, a rare and extremely aggressive childhood cancer of the nervous system.
"Lily-Mae, from Galway, is the daughter of professional ballet dancers, Judith Sibley and Leighton Morrison. A group of over 300 Irish musicians has recorded 'Tiny Dancer' in an attempt to raise money for her care, to raise awareness of neuroblastoma... We encourage Elton's fans to like the video, and we especially encourage you to visit iTunes on Friday and buy the song!," a statement on John's website reads.
John, who has a 23-month-old son Zachary with his husband David Furnish, is renowned for his charity work and has raised millions through his AIDS Foundation.