Hi, Jim. I see your point about the disappointment (despite the big smile it put on my face to see all five of them in tuxedos, singing

). I guess if I was watching TV, especially as a teenager, and they said "Ladies and Gentlemen, The Rolling Stones" -- and here comes Mick, Keith, and Ron, with no guitars...
I've seen John R sing with Hank/Bruce a few times, but I've never seen Brian singing.
I did a quick search on YouTube and I found the tune you mentioned, but it is probably not the same performance. The video and the audio don't match, but it doesn't sound like an orchestra. Never heard them play this tune before; I like it.
Kind regards,
Donna