Blues-rock has rarely gotten more down and dirty than with Texas's famous long-bearded trio ZZ Top. Billy Gibbons, Frank Beard, and Dusty Hill are responsible for some of the greatest party anthems of all-time. They churned out a number of '70s rock classics, and in the '80s they managed to adapt succesfully to changing times, scoring hits with a souped-up, synth-flavored sound. Eventually, though, they got back to their gritty, bluesy roots, and in 2004 ZZ top's contribution to rock & roll was officially recognized via their induction into the Rock & Roll Hall of Fame