He says: "The world today has lost one of the most gracious and sweetest ladies I'm blessed to have known, Delores Rhoads. Please keep her and the Rhoads family in your prayers."

Osbourne also paid tribute to Delores, saying: "I am deeply saddened to hear of Mrs Rhoads' passing. She was a wonderful woman and will be missed. I have no doubt she is reunited with her son, Randy."

She founded the Musonia School Of Music in Hollywood after graduating from UCLA with a Bachelor's degree in music. When son Randy received his first guitar, he learned to play and read music at the school.