1983 was the breakout year for heavy metal: Quiet Riot's "Metal Health" was the first heavy metal album to reach number one in the "Billboard" charts. Quiet Riot success paved the way for many heavy metal acts, glam and otherwise, as the decade progressed. That same year saw a larger wave of heavy metal albums achieve previously unheard of commercial success, with Mötley Crüe releasing its second album "Shout at the Devil", Def Leppard releasing its third album "Pyromania", and Kiss releasing "Lick It Up". Though glam metal had not yet truly emerged as a commercially viable heavy metal subgenre, these bands opened the doors.