Jimmy Gilmer and the Fireballs were an American rock and roll group, popular in the 1960s. They were known for their Tex-Mex style, combining elements of rock with a distinctive Southwestern flavor. The band, led by Jimmy Gilmer on lead vocals and George Tomsco on lead guitar, is perhaps best known for their hit "Sugar Shack," which topped the Billboard Hot 100 in 1963. Their adaptation of Buddy Holly's rockabilly sound played a significant role in the development of the genre, leaving a lasting impact on the music scene.