Kelly Osbourne has addressed the death of her father, Ozzy Osbourne, at age 76. Taking to her Instagram Stories on Thursday — just two days after saying goodbye to her dad — the host, 40, wrote, “I feel unhappy I am so sad. I lost the best friend I ever had .”

Kelly Osbourne is remembering her father, Ozzy Osbourne, with an emotional tribute that calls back to a special father-daughter moment. Two days after Ozzy died at age 76, Kelly shared lyrics from the Black Sabbath song "Changes," which she and Ozzy recorded as a duet together in 2003, to her Instagram Stories.

Just days before Ozzy Osbourne’s passing, Kelly Osbourne — who costarred on the MTV reality series "The Osbournes" with her dad as well as mom Sharon Osbourne, 72, and brother Jack Osbourne, 39, from 2002 to 2005 — addressed online speculation that the heavy metal icon’s health was deteriorating.