“Ob-La-Di, Ob-La-Da” is a song by the Beatles from their 1968 album The Beatles (often called “the White Album”). Although credited to Lennon–McCartney, the song was written solely by Paul McCartney. It was released as a single that same year in many countries, but not in their native United Kingdom, nor in the United States until 1976.
Paul McCartney wrote the song around the time that highlife and reggae were beginning to become popular in Britain. The starting lyric, “Desmond has a barrow in the market-place”, was a reference to the first internationally renowned Jamaican ska and reggae performer Desmond Dekker who had just had a successful tour of the UK. The tag line “ob-la-di, ob-la-da, life goes on, brah” was an expression used by Nigerian conga player Jimmy Scott-Emuakpor, an acquaintance of McCartney.
The song is in the key of B-flat major and written in 4/4. The alternative version issued on Anthology 3 is in the key of A major.