Here's a collection of funny parodies of Christian songs "Dr. Demento-style," like "Bartley's 6" (One Bad Pig's "Isaiah Six"), an acoustic version of "Smash The Guitar", "Knock Him Down" (MW Smith's "Rocketown"); "I'm Not Talking About The Pigeons" (The Altar Boy's "I'm Not Talking 'Bout Religion"); and "I Cover Them, They Cover Me" (Steve Camp's "He Covers Me").
