Osbourne has tragically passed away at the age of 76—just weeks after it was revealed that he was set to quit his residence in the U.S.

In her first comments since his death, Kelly Osbourne posted the opening lyrics from the song on Instagram with a broken heart emoji: "I feel unhappy I am so sad. I lost the best friend I ever had." The father-daughter duo were known for having a close relationship.

Kelly Osbourne made her first public comments on Thursday, two days after the death of her father, rock legend Ozzy Osbourne. "I feel unhappy I am so sad," Kelly Osbourne wrote in an Instagram story.

Ozzy Osbourne had a long friendship with Motörhead frontman Lemmy Kilmister, and the two musicians now have something eerily in common in death. Both hard rock legends died exactly 17 days after powering through their final concerts amid illness.

Osbourne has tragically passed away at the age of 76—just weeks after it was revealed that he was set to quit his residence in the U.S.

Osbourne died on Tuesday at 76, just weeks after he and Black Sabbath performed at their farewell Back to the Beginning concert earlier in July.

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.”

Following the singer’s death, I Am Ozzy shot back to the top of the charts and quickly sold out on Amazon. You can still pick up a copy at Barnes & Noble, or listen to the Audible audiobook, narrated by English actor Rupert Farley. His new memoir, Last Rites, is also available for preorder on Amazon and Barnes & Noble.

Entertainment producer Don Rugg of Apple Valley reflected on the death of music legend Ozzy Osbourne, who he impersonated for nearly two decades.

Lisa Stelly, 39, who was married to Ozzy Osbourne's youngest son Jack, has shared a touching tribute to the late rock star and shared a number of rare family photos

Ozzy Osbourne’s former daughter-in-law, Lisa Stelly, paid tribute to him following his death at the age of 76. On July 24, the ex-wife of Jack Osbourne posted photos to Instagram as she recalled happy times with the late Black Sabbath legend.