Two iHeartRadio hosts and best friends, Carla Marie and Anthony, dive into the beginning of a new decade, 1980. The Disco age is considered "dead," but a new sound of music emerges, Reggae and R&B are on the rise and Heavy Metal gets even heavier. Carla Marie and Anthony discuss the start of a new decade come ups and the come-downs of the year, 1980.

Former VH1 and MTV VJ Matt Pinfield touches on key moments throughout the year 1991. Pinfield looks into a year where music comforts the nation and a legend takes a final bow. On the cusp of the cold war, 1991 continues to unveil the transitions of powerhouse bands and new voices create music we listen to now to mourn farewells.

Halestorm's Lzzy Hale takes you to the year 1989. Glam says goodbye, grunge says hello, and the "King of Pop" is crowned as we leave the 80s behind for good. Meanwhile the U.S. elects a new president and the Berlin Wall stands tall for the last time.