I saw James Brown at the Metro in Melbourne in the late 80's. I bought tickets to both shows - which as a student cleaned me out for a month - and saw the gig two nights running. Even in his late 50s, wearing a tight brown three-piece suit, his moves were smooth. He did the splits in the middle of the first show on the first night and came straight back up with the flexibility of an Olympic gymnast. The only blemish was that he popped his fly. But quick as you like he did a spin and zipped it straight back up again without missing a beat.
What a show! What a band! What a legend.
Here's a sample from the 70s