Texas blues-rock legends ZZ Top celebrated their 44th (?!) year as a band with a 90-minute, career-spanning set at Bonnaroo 2013. The trio included tracks ranging from their 1971 debut to last year's Rick Rubin-produced La Futura, playing all the major MTV staples ("Legs," "Sharp Dressed Man," "Gimme All Your Lovin'"), early blues tracks ("La Grange," "Certified Blues") and covers (Jimi Hendrix's "Foxy Lady.") Despite their inclusion in the Rock and Roll Hall of Fame, to many, they're just "those guys with beards who made a few videos in the 80s." To familiarize (or re-famiiarize) yourself with the iconic band, here are 10 reasons why their set was one of Friday's best.