Jon Wiederhorn

On Aug. 26, 2008, Slipknot issued their final album with the late Paul Gray, 'All Hope Is Gone.'

On Jan. 17, 2001, bassist Jason Newsted revealed the news that he was exiting Metallica.

Take a look back at the landmark disc here.

Megadeth's third album arrived on Jan. 19, 1988.

Some say this is Priest's best album.

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

On Sept. 20, 1980, Ozzy Osbourne delivered his first solo album, 'Blizzard of Ozz.'

On Sept. 17, 1991, Ozzy Osbourne reached a career turning point with his solo disc 'No More Tears.'

Dave Mustaine would go on to form Megadeth and release one of the best thrash debut albums ever.

It wasn't an April Fool's joke.

Ozzy and Sharon Osbourne were sent fleeing from their Buckinghamshire estate due to a fire in 2005.

This one paved the way for thrash.