Ozzy Osbourne is known as 'the Prince of Darkness' and for his crazy antics on stage and off, but the singer and and entertainment personality is opening up about something more serious. This morning on Good Morning America Ozzy Osbourne alongside his children and his wife Sharon Osbourne revealed his Parkinson's diagnosis. The rocker received the news last February. "It's been terribly challenging for us all," Osbourne told Roberts. "I did my last show New Year's Eve at The Forum. Then I had a bad fall. I had to have surgery on my neck, which screwed all my nerves." Parkinson's disease, a neurodegenerative disorder that progresses slowly in most people, and has no cure.