Never, ever say 66-year-olds can’t jam. Jimmy Hall, the lead singer of the 1970s Southern rock band Wet Willie, has been working the Nashville music business for more than four decades. He’s toured with Hank Williams Jr., won a Grammy nomination, and is now playing with the band Jimmy Hall & Friends. In the track above, “That’s the Truth,” he shows off his incredible harmonica skills, along with some sassy microphone-cord dance moves and a head-shake-inducing musical range. Hank needs to be watching—if this is his back-up band, he’s going to have to step up his game.