8 p.m., Riverfest Amphitheatre. $29.50-$49.50.
It strikes me as a bit of a shame that the iconography of ZZ Top overshadows a remarkable, decades-long streak of genre-defining Texas blues rock. Sure, the three-note guitar lick from “La Grange” is just as instilled in the American consciousness as the two-note pattern from the “Jaws” theme and “Tres Hombres” will forever be one of the greatest rock albums ever, but the band will probably forever remain a caricature of dusters and furry guitars. That said, Billy Gibbons' and Dusty Hill's beards belong in the Smithsonian. But I digress. The long-tenured trio brings its crunchy, libidinous, smirkingly trashy act to the Riverfest Amphitheatre for what may or may not spur a raunchy-guitar-rock-trio-with-big-beards battle for show supremacy with Brother Andy & His Big Damn Mouth across town. This could get — wait for it — hairy. Jonathan Tyler and the Northern Lights, fresh off the “Kid Rock's Chillin' the Most” cruise (ahem), provide support.