Vince Gill

Mr. Amy Grant isn't always considered cutting-edge, but with this, he's the first major artist to release a four-CD set of all new, original material. (Prince's merely three-disc Emancipation? Child's play!) Sure, he could've consolidated. But letting different styles play out over a quartet of fun, genre-specific albums (representing traditional country, pop balladry, R&B-flavored rock, and bluegrass) allows the crooner to really prove his journeyman mettle.