Emmylou Harris, left, performs with Willie Nelson during Austin City Limits Hall of Fame on Saturday night April 26, 2014. Nelson, who will celebrate his 81st birthday next week by receiving his fifth-degree black belt in martial arts, was the first Austin City Limits performer in 1974 on what is now the longest-running television music program in the U.S. (AP Photo/Courtesy of KLRU, Scott Newton)