"I had a dream in the '60s, where my mom who died came to me in the dream and was reassuring me, saying, 'It's going to be OK".
Corden responded, "That's the most lovely story I've ever heard", and then the two sang the song together.
But perhaps the most powerful moment happens when McCartney and Corden sing "Let It Be" in the vehicle and Corden chokes up with tears. I didn't see that one coming round the corner. "I feel like it's more relevant now today than it's ever been".
"Oh man, it got me emotional there, Paul", Corden says as the song comes to an end.
France to include Olivier Giroud, Blaise Matuidi in starting XI vs Peru
Peru have now attempted 27 shots without scoring at the 2018 World Cup finals; only Morocco (28) have had more without a goal. France was successful in securing three points in its opening round of group play, picking up a 2-1 victory over Australia.
On his tour of Liverpool, McCartney points out the church where he was a choir boy, adds his autograph to the Penny Lane street sign, and visited his childhood home - a place particularly special as it's where he wrote music with fellow Beatle, John Lennon. "Just let it be'". McCartney expresses surprise that songs like "Blackbird" and "Let It Be", both performed during the in-car scenes, have stood the test of time.
He played A Hard Day's Night, Love Me Do, Back In The USSR and Hey Jude as members of the audience cried. "If my granddad was here right now, he'd get an absolute kick out of this".
McCartney made it even more poignant when he told Corden: "He is".
Setting up hidden cameras around the bar, Corden gave the regular pub-goers a surprise they'd never forget.
"That's been one of the unusual things", McCartney, around the five-minute mark in the video up top, told Corden of the lasting impact of the Beatles' message.