Article continues below advertisementOzzy Osbourne's daughter was left heartbroken after the rock legend died at age 76 on Tuesday, July 22, after a difficult battle with Parkinson's disease.Kelly Osbourne - the 40-year-old child of Ozzy and his wife, Sharon Osbourne - took to Instagram on Thursday, July 24, to react to her father's death publicly for the very first time.Article continues below advertisementKelly Osbourne Reacts to Dad Ozzy's DeathSource: @kellyosbourne/InstagramKelly Osbourne broke silence just two days after her dad Ozzy's passing."I feel unhappy I am so sad.