@edgarblythe,
Me too, though there were other singers and groups present. It was called The Shine of Stars, Shine being the trade name of some concoction intended to put a shine on your shoes. The price of admission was something, plus two Shine labels. I have no idea what all the stores in the Miami area did with all those labelless spray cans. A week after the concert, it was never heard from again.
I also saw him promoting his own brand of mobile home in Tulsa. It was end of day, and boy, did he look pooped. I don't think he even sneered that time.