It's impossible to narrow down Ozzy Osbourne and Black Sabbath's most important and influential songs to just 15, but these are a good point of entry.

Ozzy Osbourne's Black Sabbath bandmates Tony Iommi, Geezer Butler, and Bill Ward paid tribute to the late 'Iron Man' singer after his death at age 76: 'There won't ever be another like him.'

Ozzy Osbourne and Black Sabbath officially ended their legendary 57-year career in front of a sold-out crowd of 40,000 at “Back to the Beginning: Ozzy’s Final Bow,” held at Villa

A fan pays tribute following the death of Ozzy Osbourne at the Black Sabbath Bridge, on Broad Street in Birmingham, England. Sisters Evelyn, 5, and Erica, 2, gesture in front of the Black Sabbath Bridge bench.