Testify! Could this song have had any other name? Here’s Stevie Ray Vaughan doing one of his best Hendrix impressions with Double Trouble on the Isley Brothers track that became one of his favorite live gems. Stevie picks, wails, and mind-melds with his axe until he has absolutely manipulated the sounds coming out. His playing had much more massive appeal than just to blues aficionados, but it’s undoubtedly blues all the way. In fact, if you need to convert a blues guitar non-believer, this is not a bad video to start with.