So way back in the day, I have The Heptones booked to play - their English backing band & I had a disagreement a while back, so they didn't show, but The Heptones did - a hurried conference stage-side resulted in them singing (through my mic) to all the versions that I had - several times - the crowd loved it (so did I, didn't have to pay for the gig - yay - win win !)