According to Billboard.com, Willie Nelson's highest charting songs include titles such as "Blue Eyes Crying in the Rain," "City of New Orleans" and the Toby Keith duet "Beer For My Horses." According to RollingStone.com, "On the Road Again" was another defining single for the country singer.
While he would become a country icon during the late 20th century, Willie Nelson got his start in music by writing songs for other artists. Nelson wrote songs for Patsy Cline, Andy Williams, Roy Orbison and others before embarking on his own career as a performer. During the 1970s, Nelson incorporated a diverse group of influences and styles, including honky-tonk and antecedent country music, into his own distinct brand. Records such as "Phases and Stages" in 1974 and "The Red-Headed Stranger" in 1975 sold in large numbers and established Nelson as a powerful force in the worlds of country music and music in general.
Nelson also became known for his duets with other famed musicians, from Johnny Cash to Merle Haggard to Julio Iglesias. Even though Nelson was a prestigious songwriter prior to his career as a performer, he also has an extensive history of covering other artists' songs, including 2002's "The Great Divide," a popular album of covers.