“We traveled to Liverpool and got four hours with him,” explains Winstonof the June trip.

Hearing Paul sing those songs was moving and special.

The longest Carpool Karaoke segment was 14 and a half minutes; the one with McCartney was 23 minutes.

Carpool Karaoke James Corden Paul McCartneyCredit: CBS

That’s when they knew a primetime special was in order.

“We had so much stuff that we weren’t putting in it,” says Winston.

Until now, that is.

Carpool Karaoke: When Corden Met McCartney Live from Liverpoolairs tonight at 8 p.m. you’re free to find the original segment fromThe Late Late Showhere.