Alice in Chains is an American rock band formed in Seattle, Washington, in 1987 by guitarist and songwriter Jerry Cantrell and original lead vocalist Layne Staley. The initial lineup was rounded out by drummer Sean Kinney, and bassist Mike Starr (who was replaced in 1993 by Mike Inez). Cantrell, Kinney and Inez are still members of the band. Although widely associated with grunge music, the band's sound incorporates heavy metal and acoustic elements. Since its formation, Alice in Chains has released four studio albums, three EPs, two live albums, four compilations, and two DVDs. The band is known for its distinct vocal style which often included the harmonized vocals of Staley and Cantrell. Alice in Chains rose to international fame as part of the grunge movement of the early 1990s, along with other Seattle bands such as Nirvana, Pearl Jam, and Soundgarden. The band was one of the most successful music acts of the 1990s, selling over 35 million albums worldwide, and over 14 million in the US alone. In 1992 the band released their album Dirt which was critically acclaimed and has been certified quadruple platinum. The band also achieved two No.1 Billboard 200 albums (Jar of Flies and Alice in Chains), 14 top ten songs on the Mainstream Rock Tracks chart, and eight Grammy Award nominations.