A Perfect Circle is an American alternative rock band formed in Los Angeles, California in 1999 by guitarist Billy Howerdel and Tool vocalist Maynard James Keenan. A Perfect Circle has released four studio albums, the first three during the early 2000s: Mer de Noms, their debut album in 2000, and followed up by Thirteenth Step in 2003; then in 2004, Emotive—an album of radically re-worked cover songs. Shortly after Emotive's release, the band went on hiatus; Keenan returned to Tool and started up solo work under the band name Puscifer
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