"Paul McCartney says he 'revisits' Beatles through songs"
Sir Paul said that on his concert DVD, Good Evening New York City, he can be seen getting emotional in the song for Lennon.
"It catches me out in this film version where I realise I'm telling this man that I love him, and it's like, 'Oh my God!'. It's like I'm publicly declaring this in front of all these people I know well. What am I doing?
"I couldn't have done it when I was 18 because I would not have allowed myself to cry or go anywhere near that as an 18-year-old guy - now it's okay. I'm used to it."