It's a seasonal staple, Christmas classic covered by artists aplenty from Glee Cast to Crazy Frog.
Shifting 1.8 million copies, Wham's evergreen earworm is biggest selling single ever to miss out on UK chart top spot, beaten by Band Aid - featuring ubiquitous George Michael - but his and Andrew Ridgeley's donated royalties actually made more money for Ethiopian famine appeal. This year, to save us from tears, check if you're singing along correctly to this festive favourite, unhelpfully here accompanied by instrumental version. Give yourself bonus point if you recall singularly forgettable Everything She Wants double A-side flip. And, if you like our quiz, share it with someone special ... special.