I'm going with Pink Floyd
Delicate Sound of Thunder and David Gilmour:
Remember That Night - Live At The Royal Albert Hall (video).
For the Delicate Sound of Thunder tour, David had Scott Page playing sax. During "Money" he yells into the bell of his Sax where there is a chordless microphone. I tried over and over to understand what he said, but could never make it out.
A couple of years after the video and CD came out I was at a MacWorld Expo in Boston. There, in one of the little 10' x 10' booths was Scott Page and a bass player rocking out demoing some recording software. I waited until he was done and they were taking a break.
I introduced myself and told him that I really enjoyed his playing on the Delicate Sound of Thunder tracks. We talked a bit about the tour, he was very nice and approachable. I asked him about the 3 backup singers they had on that tour and he told me that Dave was going with really cute one closest to him on the stage - and she was a real hottie. (Rachel Fury)
Then I said, "What did you yell into the bell of your sax during 'Money'?"
Scott started laughing so hard, he had to sit down. I asked what was wrong and he told me that no one had ever asked him that before. I asked was it bad or was there a problem and he said it was ok - he had yelled "Yo! Buford!". I asked who that was and he said Buford (Jones) was the sound guy and he was just messing with him. They ended up leaving it on both the video and the CD and not cutting it out.
For his concert at the Albert Hall (and for the On an Island CD) David's backup singers were a couple of unknowns named David Crosby and Graham Nash with an appearance by David Bowie singing "Arnold Lang".
