Legendary singer Paul McCartney's Carpool Karaoke outing has been hailed by fans as "brilliant" and "truly spectacular".

The 76-year-old former Beatle delighted viewers with a tour around his hometown of Liverpool along with an iconic trip to Penny Lane.

The Drive My Car hitmaker also treated locals to an impromptu session in a city centre pub, which got rather emotional for Corden.

After it aired on US TV, fans took to Twitter to praise McCartney's segment, with one viewer posting: "Tonight’s #McCartneyCarpool with Sir @PaulMcCartney was not only brilliant, but also emotional, heart warming and the best car pool karaoke episode that has ever been recorded! Glad I didn’t miss."

Another social media user commended the "legend" for providing what he deemed to be a "historical night" for the popular TV show.

Many people commented on the fun and energy the English singer-songwriter brought to the 23-minute video.

Even Corden himself agreed that it was his favourite edition of the show to date.

McCartney's Carpool Karaoke will air on Sky One at 10pm on Friday, June 22.