Just saw this last night - "The Greatest Concert Video No One Ever Saw."
Fun bits of trivia: actress Terri Garr was a go-go dancer in the show. She's wearing the shirt with a big target design on front and back. I spotted her right away, but only as a face I recognized. I had to do some research to figure out it was her. Singer/choreographer Toni Basil ("Hey Mickey") was also a go-go dancer - I'm not sure which one was her, but the brunette in the bikini is a pretty close match.