John Michael Ozzy Osbourne (born December 3; 1948) is the lead vocalist of the pioneering English heavy metal band Black Sabbath; a multi-platinum; award-winning successful solo artist and the star of the reality show; The Osbournes. Considered by many to be the Godfather of Heavy Metal; Ozzy has enjoyed a career that has now spanned four decades.Osbourne experienced tremors for some years and linked them to his continuous drug abuse. In May 2005 he found out it was actually Parkin Syndrome; a genetic condition; the symptoms of which are very similar to Parkinsons disease. Osbourne will have to take daily medication for the rest of his life to combat the involuntary shudders associated with the condition. Osbourne has shown symptoms of a mild hearing loss; as evidenced in the television show; The Osbournes; as he often asks his family members to repeat what they say.