On August 3, 1987, Def Leppard released their fourth studio album, "Hysteria." The album achieved massive success, hitting #1 on the US Billboard charts and also reaching the top spot in the UK, Norway, Australia, and New Zealand. Featuring the iconic hit "Pour Some Sugar On Me," "Hysteria" became one of the defining albums of the 80s rock scene, showcasing the band's powerful sound and production.