Rival Choir, formerly known as Mouth of the South, was an American Christian post-hardcore and metalcore band from Denton, Texas formed in 2007. The band signed with Facedown Records in January 2014. Struggle Well was the band's last album under the name Mouth of the South. After announcing their change from Mouth of the South to Rival Choir, their new album—I Believe, Help My Unbelief—was released on February 5, 2016, also by Facedown Records. On November 18, the band released the debut single from the new album, entitled "Aftermath".