Conversation so far:
Is Her Majesty the name of a Beatles album?
Her Majesty is a song by the English rock band The Beatles from their 1969 album Abbey Road.
Did the rest of The Beatles like Her Majesty?
McCartney disliked the way the medley sounded when it included Her Majesty, so he asked for it to be cut.
What was the musical effect that The Beatles liked on Her Majesty
Mastering engineer Malcolm Davies cut a playback lacquer of the whole sequence of the master tape, including Her Majesty. The Beatles liked this effect and included it on the album.
How was The Beatles' Her Majesty received by the public?
Did any other musicians besides The Beatles contribute to Her Majesty?
Although credited to the band, McCartney is the only Beatle to appear on the track.
What year was The Beatles' song Her Majesty created?
The song was recorded in three takes on 2 July 1969.
Was the creation of The Beatles' song Her Majesty influenced by any other songs?
Her Majesty was recorded by McCartney on 2 July when he arrived before the rest of the group at Abbey Road.

Question: How much did John Lennon contribute to the song?
Self-contained rewrite: How much did John Lennon contribute to the song Her Majesty?