Crack the Skye is the fourth studio album by American progressive metal band Mastodon, released on March 24, 2009 through Reprise Records.Released: March 24, 2009Label: Reprise RecordsGenre: Heavy metal, progressive metal, alternative metal1. Oblivion 0:002. Divinations 05:483. Quintessence 09:154. The Czar 14:445. Ghost of Karelia 25:376. Crack the Skye (featuring Scott Kelly) 31:027. The Last Baron 36:578. Oblivion [Instrumental] 49:579. Divinations [Instrumental] 55:45Personnel:Brann Dailor -- drums, percussion, lead vocals on OblivionBrent Hinds -- lead vocals, guitarBill Kelliher -- guitarTroy Sanders -- lead vocals, bass**MM** - 2