One hit single is one more than most bands ever achieve ... Here are the 20 best one-hit wonders of the '70s.

In 2016, scientists at the University of St Andrews developed a mathematical formula for explaining what makes an earworm.

This vinyl here went No1 here in the UK." A stunned Palmer replied: "I didn't even know that." The England star was shown a clip of the band playing the hit Sad Sweet Dreamer on Top of the Pops.