Black Sabbath frontman Ozzy Osbourne died following his battle with a genetic form of Parkinson's disease, while a brain expert says the singer's lifestyle could have contributed.

Kelly Osbourne, the famous daughter of rocker Ozzy Osbourne, is speaking out after his death. Kelly, 40, posted an Instagram story with a black screen and a broken heart emoji, accompanied by the text "I feel unhappy I am so sad. I lost the best friend I ever had."

With the song’s original lyrics reflecting a breakup experienced by Black Sabbath cofounder and original drummer Bill Ward, the updated version sees Kelly Osbourne expressing love to her “daddy” and acknowledging that she’s found her “way” in the world.

Meanwhile, Ozzy’s oldest daughter, Aimée Osbourne is worth an estimated $7 million. His other daughter, Kelly Osbourne, had an estimated net worth of $16 million, and his son, Jack Osbourne, has an estimated net worth of $15 million, according to the site. So, again, it appears that the “Prince of Darkness” left his family in a blessed situation.

Sharon Osbourne's friends are reportedly worried about the star after the tragic loss of her husband Ozzy Osbourne, who died earlier this week at the age of 76

Ozzy Osbourne’s farewell was nearly canceled until Sharon reportedly struck a bold backstage deal that let him rock one last time.

Black Sabbath singer Ozzy Osbourne's sisters recall their final interactions before his death at 76, noting he was frail but still joking before a farewell performance in England.