Ozzy Osbourne, born John Michael Osbourne in 1948, is a renowned British musician and songwriter primarily known for his work in heavy metal. He first gained prominence as the lead vocalist of the pioneering band Black Sabbath, which played a significant role in the development of the heavy metal genre. Osbourne's distinctive vocal style, marked by a dark, dramatic delivery, has been a defining element of his music, both with Black Sabbath and as a solo artist. His solo albums, notably "Blizzard of Ozz" and "Diary of a Madman," have had substantial influence on subsequent generations of metal musicians.