Few bands would come to define the sound of alternative rock in the ‘90s more than Pearl Jam. By the time the Seattle group formed in 1990, its members had already played in several crucial early grunge acts, including Green River and Mother Love Bone. Beginning with their debut album, 1991's multi-platinum hit Ten, Pearl Jam eclipsed even breakthrough alternative acts like Nirvana in popularity. With influences ranging from hard-driving punk to delicately melodic rock, their iconic sound made them one of alt-rock's most influential acts throughout the coming decades.