(FILES) In this file photo taken on June 20, 2015 Dusty Hill of US rock band ZZ Top performs on stage during a concert in the Azkena Rock Festival in the northern Spanish Basque city of Vitoria. - Dusty Hill -- the long-serving bassist of American rock-blues band ZZ Top -- has died at the age of 72, his fellow band members announced on Facebook on July 28, 2021. No cause of death was cited for Hill, who played bass for the Rock and Roll Hall of Famers from Texas for more than 50 years. (Photo by ANDER GILLENEA / AFP)