Article continues below advertisementJack Osbourne is opening up about the heartbreaking moment he found out his father, Ozzy Osbourne, had died.In the latest episode of his "Ghost and Grit" podcast, uploaded to YouTube on Wednesday, September 3, Jack recalled being woken up in the middle of the night at his Los Angeles home. A longtime family employee, who had worked with them for 30 years, knocked on his door at 3:45 a.m. to deliver the devastating news.