They're an unlikely pair, to be sure -- gospel great Mavis Staples and Wilco leader Jeff Tweedy -- but their partnership is nothing short of inspired. Their 2010 project You Are Not Alone won Staples her first Grammy. That it came in the Americana category just proves this icon's range. One True Vine is a bit deeper, a bit darker, a bit more acoustic, but no less iconic. Staples steps up to the pulpit on tracks like "Holy Ghost" and the Tweedy original "Jesus Wept." But she's no saint. This is real music for real people, and the songs have the power to reach well beyond church walls.