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.

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.

Ozzy Osbourne was at home amid the things he loves most in the days leading up to his death, a source tells PEOPLE. Osbourne, 76, died on Tuesday, July 22, with his family, including wife Sharon, by his side.

Ozzy Osbourne’s sisters are grieving the loss of their beloved brother. Jean Powell and Gillian Hemming opened up to The Mirror about their sibling, whose real name was John Michael Osbourne, and spoke about the last time they saw and talked to him.

Word of Osbourne’s demise came weeks after the ailing front man reunited with his original Black Sabbath bandmates.

Ozzy Osbourne has died at the age of 76, and his funeral details are likely now being finalized. In a prior interview, Osbourne specified a specific song he wanted played at his memorial. The rock legend was the vocalist of Black Sabbath and died in his hometown of Birmingham,