def leppard

The '80s brought us a lot of innovation and you can see the rock world shifting through each year of the decade.

These songs have been played over and over, including some that have been performed more than 3,000 times.

Breaking down the most collected albums from Metallica, Judas Priest, Def Leppard and other big metal acts from the 1980s.

Gojira, Alice Cooper, Machine Head, Mammoth, Pantera, Ghost and more all paid tribute to Ozzy Osbourne onstage after the musician's death on Tuesday.

The genre's best bands had a penchant for reinvention — making this list especially difficult.

Do you know your ABCs of Rock? We hope so as there are well known rock bands for every single letter of the alphabet.

The subgenre packed a harder punch than its detractors were willing to admit.

Some bands did not fit the hair metal mold, but played along convincingly enough for at least one album.

Are these bands hair metal or not? History lumps them into the subgenre, but there's some arguments to be made against it!

The best of the best, year after year. The rock world has evolved quite a bit from 1970.

Come see all the songs that these big rock and metal bands only played live once!

Try picking only 25 rock + metal albums from each decade that you would want to ensure your kids listened to. It's a harder exercise than you might think.