Jon Wiederhorn

On July 21, 1971, Black Sabbath released their 'Master of Reality' album.

Black Sabbath, with Ronnie James Dio back in the band, released their 'Dehumanizer' album on June 22, 1992.

Metallica stepping way outside their comfort zone.

The last GN'R album with Slash and Duff.

KISS released 'Rock and Roll Over' on Nov. 11, 1976.

Mötley Crüe were unapologetically obsessed with crafting the kind of sticky, sleazy hard rock that defined MTV hair metal.

On Aug. 21, 1977, Motorhead began their career ascent with their self-titled album.

On Aug. 7, 1986, a judge ruled on a lawsuit against Ozzy Osbourne and his record labels tying the song 'Suicide Solution' to the death of a teen.

One of the biggest albums ever.

Here's how one of the most successful rock albums ever came together.