Until 1974 John Lennon was the only former Beatle not to have scored a #1 hit as a solo artist.
For this song Elton John joined Lennon in the studio on piano and harmony vocals. While in the studio Elton bet Lennon that the song would hit #1. Always the sceptic Lennon took the bet. The stakes would that Elton had Lennon promise to appear on stage at one of his performances should the record indeed hit number one.
The record did go to #1, and as agreed a reluctant John Lennon appeared at Elton John’s Thanksgiving performance at Madison Square Garden . It was his last major concert appearance
John Lennon’s Whatever Gets You Through the Night