This performance special of Choirs Perform showcases seven of the world's leading choirs and their contrasting choral traditions. In Choir Works, the four programs set out to show how singing in groups is fundamental to the way communities express themselves. From the joyous sounds of South Africa, through Nashville, USA, and Bulgaria, to the traditional cathedral choirs of England, the series gives a refreshing overview of some of the vastly different choral traditions of the world today.