Nevermind was Nirvana's breakthrough album released in 1991. It featured their hit single "Smells Like Teen Spirit" and helped popularize the alternative rock genre mainstream. The iconic album cover depicted a naked baby underwater chasing a dollar bill on a fish hook. After one more studio album, Nirvana's lead singer Kurt Cobain died, leading to the band's breakup. The album is considered one of the most influential of all time.