Ozzy Osbourne, the 75-year-old Black Sabbath frontman, has admitted to using marijuana again amid his ongoing health struggles. The rock legend, who has been battling Parkinson’s disease and chronic pain, made the candid revelation on his Madhouse Chronicles podcast. “I am happier, but I am not completely sober. I use a bit of marijuana from time to time,” Osbourne confessed. His wife, Sharon, 71, continues to play a crucial role in keeping Osbourne’s drug use in check. The rockstar praised his wife’s firm approach, saying: “I am lucky my wife kicks my butt all the time and she would make life…