Two more images from How Sweet The Sound. The singers in the top picture are from the New Sunny Mount Missionary Baptist Church in St. Louis. Their act (and it was a theatrical act, among other things) was based on beautiful voices, pulsing religious music, precision timing and dramatic hand and arm gestures. Silver-white gloves got the attention of the audience as the movement enhanced the message of the hymn. You can see another picture of this here.
The choir in the bottom picture is from St. Alphonsus Liguori Rock Catholic Church, also in The Lou. The judges, who I think are from Baptist backgrounds, expressed pleased surprise that a Catholic choir could rock out in praise so very well.
New Sunny Mount won the people's choice award, in which the audience got to send a text message naming their favorite. It also won the judges' grand prize, getting a lot of money for the church and a trip to Washington, DC, for the finals.