Shine! was a late 80's english pop band from Norfolk. They released a flexi in 1989 named "Millions And Millions" on Baz McHat Records. Then, their song "I Just Can't Celebrate Today" was featured on the "Everlasting Happiness" compilation.
If anyone has any more info, by all means please share it. In the meantime, enjoy the tune. It would be hard not to, the (misleadingly) downbeat title notwithstanding.