From Hollywood Boulevard to London, with a stop in Cleveland, there is no Walk of Fame or Rock & Roll Hall of Fame without a star with his name on it. Few rock stars are more deserving of the appellation than Ozzy Osbourne. As the leader of Black Sabbath, the pioneering heavy metal band, he has transcended the name to become a true icon of pop culture. The two occasions in which they have performed on the stages of Azkena Rock Festival have been of those moments that have contributed to make the festival excellent in its 20 years of history.