A visit to the famous Penny Lane was followed by a call at the singer's childhood home before the visit culminated in an emotional singalong at a city centre pub. "I didn't feel it coming". "Can you please, please help me" before joining Paul in a rendition of Drive My Car.
Image: Sir Paul and James Corden in Penny Lane.
Dave Grohl and his Foo Fighters bandmates aren't the only ones to speak out and claim their "Carpool Karaoke" segment wasn't totally enjoyable, as Britney Spears said she found it all rather "awkward" when she was in the passenger's seat. McCartney expresses surprise that songs like "Blackbird" and "Let It Be", both performed during the in-car scenes, have stood the test of time.
Within seconds of the former Beatle arriving, the pair are driving through the streets of Liverpool singing Drive My Car.
Throughout their journey, he pointed out notable landmarks from his youth, including a church where he was once in the choir. "We expected it to last 10 years, but it keeps going on, and on, and on", McCartney says, "and it keeps being relevant".More news: Centre wants terrorism to end in Kashmir: Rajnath Singh
He recounted the story of how he came to write Let It Be, saying a dream of his mother had inspired the song.
"I can remember my granddad, who's a musician, and my dad sitting me down and saying, "We're gonna play you the best song that you've ever heard" and I remember them playing me that", Corden explained.
The Late Late Show host then began to cry and revealed that his grandfather and father once sat him down and played him Let It Be.
Paul then took James on a tour of his house where he and the late John Lennon used to write songs together.
Eventually, they end up at a pub to give the locals "the surprise of their life", Corden said.