Def Leppard - Armageddon it

"On October 14, 1988, Def Leppard became the first act in chart history to sell seven million copies of two consecutive LPs, with Pyromania (their third studio album released in 1983) and Hysteria, (which became the band's best-selling album to date, selling over 20 million copies worldwide, and spawning six hit singles)."