Is this the worst song ever?
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A Sausage CaRoll | Walkers Christmas Advert 2020 | Walkers Crisps - YouTube
No, the worst song ever is 'Tomorrow' from the so-called musical 'Annie', a close runner up being 'Ebony and Ivory' by Paul McCartney.
Paul’s worst atrocity was Yesterday
At least in Yesterday he wasn't hammering too many syllables of trite phrases into musical bars that they just wouldn't fit. Hence piano, 'pi-an-o' becoming 'pyan-o'.