For better or for worse, Willie Nelson has an enduring legacy. He’s still performing music and making records at the tail end of a 60-year career. He’s crisscrossed the U.S. and is regarded as a music legend, so it shouldn't be hard to sell anyone on his show at Billy Bob’s Texas. For instance, Dolly Parton was recently announced as the winner of the Country Music Association’s “Willie Nelson Lifetime Achievement Award.” If that doesn’t speak to the formerly red-headed stranger’s impact on his craft and on our lives, not much else can. From country music standards like “Hello Walls" to hits like “On the Road Again,” Nelson has an immortal oeuvre that coexists with the singer’s association with other country giants such as Waylon Jennings, Kris Kristofferson and Merle Haggard. When you pair his musical impact with his political advocacy, Nelson is clearly the living end of an era.