For 51 years, the band comprised vocalist-guitarist Billy Gibbons, drummer Frank Beard and vocalist-bassist Dusty Hill, until Hill's death in 2021. Rooted in blues, ZZ Top developed a signature sound based on Gibbons' blues guitar style and Hill and Beard's rhythm section. They are popular for their live performances, sly and humorous lyrics, and the similar appearances of Gibbons and Hill, who were rarely seen without their long beards, sunglasses, and hats.