Wow... that must have been a good one!
He was thin just a a teen. he had bodyguard or assistant. He stood on chair and di fingertips and the bodyguard put his arms around him to brace him as he literally jumped up and down on the chair.
I had seen him when the hit frost came out. On Amer Bandstand. I think he was 13.
We saw Supremes twice in one year including on our honeymoon at theater in the round across from disneyland that I think became a church.