LA – Ozzy Osbourne, the Prince of Darkness’ health has worsened amid his Parkinson’s battle. After his wife, Sharon Osbourne, recently canceled his appearance at this month’s Mad Monster Party, concerns were raised about his condition, a source told Radar Online: “Things have taken a turn for the worse, and as always Sharon wants to protect him,” and it is a “terrible sign that the Black Sabbath vocalist couldn’t even make a short trip on a private jet from LA to Phoenix for the event.”