The original version recorded by Lennon more than 40 years ago came from the same group of demo recordings that his former bandmates used to create the songs Free As a Bird and Real Love in the mid-90s. Sir Paul McCartney also added a new string guitar part with help from Giles Martin, the son of the late Beatles producer George Martin. The finishing of the track used AI to separate out Lennon's original vocals from his original recording on tape before incorporating McCartney and drummer Ringo Starr's musical additions in the studio last year. The track is everywhere now on the top of new music lists on streaming services today but there's also a pretty cool short film out on the band's YouTube which dives into further detail. Pretty incredible and quite moving, actually, especially that chorus. Watch here