The day-long concert special featured standout performances from Osbourne and Black Sabbath, Metallica, Guns n' Roses, Jack Black and more.

Boozers were decked with purple balloons and flags; murals were everywhere you looked; people donned Ozzy outfits, flooding the streets with battered T-shirts and denim jackets. It felt like a World Cup final for the metal fans who flooded in from every corner of the planet .

Osbourne, who has been battling a variety of serious health issues for several years, is making good on a promise to end his performing career on his own terms, performing a solo set in addition to reuniting with the original lineup of Black Sabbath one last time.