Thomas Elmer Duncan, was an American Western swing vocalist and songwriter who gained fame in the 1930s as a founding member of The Texas Playboys. He recorded and toured with bandleader Bob Wills on and off into the early 1960s.

James Robert Wills was an American Western swing musician, songwriter, and bandleader. Considered by music authorities as the founder of Western swing, he was known widely as the King of Western Swing. He was also noted for punctuating his music with his trademark "ah-haa" calls.