I don't know if this helps but after the repeats of the first four bars, I think the next four bars which are also repeated are the same but with a run up the scale in chord notes from the low note to the highest note in each bar, then the singing begins after that. I think.

I suspect I'm going to have to set up camp in the supermarket until they play the song again. It would have been easier if Hubby's hearing was a bit sharper, because he would have picked it straight away or at least identified the band or singer.

I don't think I said it initially, but I suspect the song is at least 20 years old, i.e. older than most of the workers at the supermarket, so if I had asked they would have said, "It's a bit old, I wasn't even born then" and looked down their young adult noses at the little old lady bothering them with useless questions. :-D