Sir Paul McCartney delighted hundreds of Beatles fans last week when he returned to his hometown of Liverpool for a special nostalgia tour of all the old hotspots.

The visit was in lieu of a brand new episode of “Carpool Karaoke” featuring James Corden from The Late Late Show. Throughout the 23-minute show, Corden and McCartney chat and joke about what it was like to be in the Beatles, how McCartney wrote some of his songs, and how it feels to think about the old days.

As the tour starts off, the former Beatle fittingly joins the talk show host for “Baby You Can Drive My Car” before the trip eventually leads them into a rousing rendition of “Penny Lane”, which they sing as they simultaneously visit some of the spots that are mentioned in the song, including the barbershop. Not surprisingly, the stylist working at the shop is stunned to see McCartney standing on her doorstep.

At about 4:50 into the video, McCartney explains his heart-wrenching inspiration behind the song…