With the release of Unmistakable, Jo Dee Messina steps firmly into the front ranks of country singers with staying power. An album that displays both her songwriting prowess and her abilities as a co-producer, Unmistakable is above all a showcase for one of the genre's most remarkable and distinctive voices.

"I knew she was a great singer," says Chris Ferren, one of five co-producers who worked with Jo Dee on the project, "but I guess I didn't know how great until I worked with her." That i...