This Fadd9 was played on a 12-string, which adds a lot to the sound; the bass guitar adds a different root note, plus there’s piano and John Lennon’s acoustic ... this is a staple Em7 chord shape used ...

we’re going to use the piano chords Am9, Cmaj7, Em7, Am9, Cmaj7sus4/F, E. To begin with, we just insert a new chord on the downbeat of each bar. Notice how Am9 and Cmaj7 are basically the same chord ...