Kelly Osbourne has released a statement following the death of her father Ozzy, saying she “lost the best friend I ever had.”

“I feel unhappy, I am so sad. I lost the best friend I ever had,” she said on her Instagram story, quoting the lyrics of Black Sabbath song “Changes.”

The song originally appeared on the band’s 1972 album “Vol. 4” before Ozzy and Kelly recorded a version together in 2003 with altered lyrics, changing the song from depicting a romantic breakup to a father-daughter relationship drifting apart.

Until “The Osbournes” – the reality TV show documenting their family life – aired from 2002 to 2005, Ozzy was best known as the “Prince of Darkness,” a pioneer of heavy metal and rock whose legendary, and controversial, antics on stage once included biting the head off a live bat. (He thought it was rubber.)

But through his interactions with his wife, Sharon, and his youngest children, Kelly and Jack, the public were introduced to his domestic side, watching him bumbling around the house and telling his children not to do drugs.