Kelly Osbourne paid tribute to her late father, Ozzy Osbourne, by sharing a special version of the Black Sabbath song Changes. She called him her "best friend.

The lyrics for “Changes” were originally written by Black Sabbath bassist Geezer Butler, and the song appeared on the group’s 1972 album “Vol. 4.” In 2003, Ozzy and Kelly released a duet version of the song as a single. The song’s original lyrics are: “I feel unhappy, I feel so sad / I’ve lost the best friend that I ever had.”

Ozzy Osbourne has been remembered as a “pioneer,” a “fearless talent” and a “dear friend,” in an outpouring of tributes from fellow musicians and his former Black Sabbath bandmates following his death on Tuesday at the age of 76.

Heavy metal legend Ozzy Osbourne dies at 76. The Grammy-winning Prince of Darkness long struggled with addiction, finally achieving sobriety in 2014.

Today, as we mourn Ozzy's passing, we should remember that Black Sabbath's legacy extends far beyond their game-changing sound. They also established the principle that heavy music required equally heavy visuals, and proved that album art could be as transgressive as the music itself.

Fellow legends of heavy metal along with stars of music, film and TV are honouring the British rocker following his death aged 76