(and Gummitch). Willie Nelson is certainly one of, if not the most, recognizable cross-over rock and country singer/songwriters. Beginning in the 1970s, “outlaw country” was defined by people like Nelson and Waylon Jennings, writing and playing for a rock and roll audience as well as the Grand Old Opry crowd. I found it interesting that most of the videos on YouTube feature duets or group performances; there is relatively little of him singing solo. More after the jump.