Nirvana immediately found their footing in the industry with the release of their debut studio album, Bleach, back in 1989. While it wasn’t a commercial triumph for the American rock band, the record did receive favorable feedback from music critics. However, things changed almost overnight with the release of what would become a defining album of their career. Released in 1991, Nevermind — the band’s second studio album — is a classic in several respects: it spawned a breakthrough single (“Smells Like Teen Spirit”), featured one of the most iconic album covers in rock history, sold millions of copies worldwide, brought grunge and alternative rock into the mainstream, and ultimately became a cultural phenomenon.