It's a Beatles classic, released in 1968, and was at the time the longest single ever to top the British charts, and tied the record for the longest time spent at the top of the US charts - 9 weeks.
But did you know that Hey Jude contains swearing?
Around 2:58 into the song, Paul McCartney hits the wrong key on his piano; John Lennon exclaims "Oh!", then McCartney can be heard swearing!
Lennon insisted the curse word stay in the final recording, but it was dropped to a lower register so it's harder to hear. But it's definitely still there, and once you hear it, you'll never be able to unhear it again.
WARNING: Contains (barely audible) swearing!