King, 82, took a wheel chair to get to the stage at Bonnaroo, the annual festival held in the Tennessee countryside south of Nashville. King walked slowly onto the stage where he took his perch on a chair with his prized guitar, Lucille.
But the legendary bluesman showed that his fingers haven't showed a bit of aging. As he has throughout his long career, he never hit a wrong note.
Sitting, King wondered if the crowd might be thinking he must be very old to be unable to stand up and play.
"I say to you, you're just about right," said King, who rattled off his list of ailments: diabetes, a bad back, bad knees, among them.
"I can't remember anything, but I can remember that I am now 82-years-old," he said, as the audience cheered.
King also did a bit of schooling, asking the youngish crowd if they realized that Bono from U2 had written his classic tune "When Love Comes to Town" specifically for him.
"Do you know U2?" asked King, bulging his eyes. "That was me. I say, that was me!"