In the blues' evolution from acoustic/rural to electric/urban, T-Bone Walker's contributions are profound. The Lone Star pioneer was one of the first guitarists to amplify his instrument (this occurring in the early '40s). Moreover, his jazzy style (complete with horns) would go on to shape Texas blues, jump blues, Memphis blues and even soul blues. Where the music coming out of the Delta was heavy and raw, Walker was sophisticated and smooth -- yet no less intense. From "Call It Stormy Monday" to "Evil Hearted Woman," be prepared for an onslaught of hustling, heartbreaking and two-timing.