Kelly Osbourne is mourning the loss of her father Ozzy following his death on Tuesday. Osbourne posted a brief message to her Instagram stories on Thursday afternoon. “I feel unhappy I am so sad,” she wrote. “I lost the best friend 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.

As tributes continue to pour in, two of Ozzy Osbourne's children — Jessica and Louis — have honored their late father in subtle ways after the former Black Sabbath frontman and legendary rocker died on Tuesday,

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.

Sharon Osbourne is reportedly considering burying her husband Ozzy in the gardens of their Buckinghamshire estate. The Black Sabbath rocker died aged 76 on Tuesday following a battle with Parkinson’s,

“The moment he walked out on stage, it was just like he was shot with a bolt of lightning and he came alive,” Glendenning recalled. “I didn’t even think it was physically possible for a person that existed day to day the way he did to have that much energy and to turn on that much and to be that much of a showman.”