An emotional James Corden has taken Sir Paul McCartney on a magical mystery tour of Liverpool.
During the latest edition of Carpool Karaoke, Corden sheds a few tears as the pair sing Let It Be while touring Sir Paul's home city.
"Oh man, it got me emotional there, Paul," Corden says as the song comes to an end.
During the film, the pair also visit one of Sir Paul's childhood homes, go to Penny Lane, and pop into a pub for an impromptu performance.
It begins with Corden ringing Sir Paul and asking for his "help", adding that he "needs somebody, not just anybody".
Within seconds of the former Beatle arriving, the pair are driving through the streets of Liverpool singing Drive My Car.
Penny Lane is also on the itinerary, where Sir Paul autographs a street sign and they spot the barber shop in the song, nipping in for a chat.
After getting back in the car, Corden says Sir Paul's music is "so full of positivity and joy", and "more relevant now today than it's maybe ever been".
The Beatles expected their music to last 10 years, Sir Paul says, but it keeps "going on and on and on".
As they chat, Sir Paul says he wrote Let It Be after his late mum spoke the words to him in a dream.
They sing the song and Corden cannot contain his emotion.
Next they go to 20 Forthlin Road in Allerton in south Liverpool, where Sir Paul lived as a teenager.
"I've never been in since I lived there," Sir Paul says.
It is now a National Trust property.
As they look around, Sir Paul says one of the downstairs rooms is where "me and John would often come to rehearse or to write".
Sir Paul sits down at the piano and plays When I'm 64.
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Later, he performs some Beatles hits after appearing from behind a curtain in a pub.
Corden, who reckons it is "quite possibly the best Carpool Karaoke we've done so far", says it is something he will "never ever forget".
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