Apollo Kids is the ninth studio album by American rapper and Wu-Tang Clan-member Ghostface Killah, released on December 21, 2010, by Def Jam Recordings. Guests on the album include several Wu-Tang members and affiliates, as well as Redman, Black Thought, Busta Rhymes, Joell Ortiz, and Game, among others. Apollo Kids is the follow-up to Ghostface's R&B-oriented Ghostdini: Wizard of Poetry in Emerald City (2009) and serves as a return to the characteristic "Wu-Tang Sound". Ghostface Killah recorded the album at Red Bull Studios and Stark Studios in New York City. He conceived it as a mixtape for Def Jam after having partially recorded the Supreme Clientele sequel album and opting not to release that with the label. Although it only charted at number 120 on the Billboard 200, Apollo Kids received universal acclaim from music critics, who praised its gritty aesthetic and Ghostface Killah's unfiltered rapping.