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.”

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.