ZZ Top is an American rock band formed in Houston, Texas, in 1969. The band maintained a constant lineup for over five decades—consisting of vocalist-guitarist Billy Gibbons, drummer Frank Beard, and bassist-vocalist Dusty Hill until Hill's departure, and eventual death, in 2021. ZZ Top developed a signature sound based on Gibbons' blues style and Hill and Beard's rhythm section. They are known for their live performances, sly and humorous lyrics, and the matching appearances of Gibbons and Hill, who wore sunglasses, hats, and long beards.