The Beatle spoke to Lennon's son Sean for 'John Lennon At 80'
"It really, really would have been a heartache to me if we hadn't have reunited"
"There were a few that were clearly by young songwriters who don't quite know how to do it"
The new documentary will mark Lennon's 80th birthday.
'Lennon's Last Weekend' will feature the artist's final interview before his death on BBC Radio
The Elpico A55 is a favourite of Macca's...
The singer/songwriter also recalled her own fears about performing in the White House in 2012
The pair joined forces in 1997
He's not sold on Broadway either
"I also knew that, if I managed to save it, I would be saving it for them"