He reaches the milestone through Kacey Musgraves' "Uncertain, TX," extending a chart history that began in 1962. Willie Nelson performs during the Georgetown to Austin March for Democracy rally on July 31, 2021, in Austin, Texas. Getty Images Trending on Billboard Willie Nelson joins Dolly Parton as the only artists to appear on Billboard ’s Hot Country Songs chart in each of the last seven decades, as the iconic performer is featured on Kacey Musgraves ’ “Uncertain, TX.” The track opens at No. 50 on the May 16-dated ranking with 2.4 million official U.S. streams May 1-7, according to Luminate. It’s one of 15 songs on Musgraves’ Middle of Nowhere , which debuts at No. 2 on Top Country Albums. Written by Musgraves and longtime creative partner Daniel Tashian, “Uncertain, TX” extends one of country music’s longest running chart histories: 64 years and two months after Nelson first reached Hot Country Songs with “Willingly,” which hit No. 10 in 1962.…