Ozzy Osbourne left behind a very heavy legacy. Here's a look at his best songs, from Black Sabbath's "Paranoid" to "Crazy Train" and "Mr. Crowley."

Ozzy Osbourne has died at the age of 76. Let's revisit some of his best songs from Black Sabbath like Crazy Train.

Black Sabbath War Pigs isn’t just a song, it’s a protest wrapped in a thunderous guitar riff. With lyrics condemning the horrors of war and corruption, and Ozzy’s chilling vocals leading the charge, it remains one of Black Sabbath’s most powerful tracks.