Concertgoers have have been left stunned after James Corden raved with them as he crashed Harry Styles' final tour date.

The former One Direction member has been touring for what seems like forever at this point, with many millions of fans having the opportunity to see the singer live.

Over the past two years, Styles has had so many memorable tour moments, from much-talked about outfits, wardrobe malfunctions, to even helping fans with gender reveals. He really is a man of many talents.

Styles rounded off his long-running world tour in the Italian city of Reggio Emilia last night (22 July), where his best pal was on hand to provide him some support.

That is James Corden of course, though going by the viral videos on the internet, the TV host was not exactly there to support his mate, but instead to have a blast with his fans.

TikTok/@nkkarts

In a video uploaded to TikTok by the user @nkkarts, Corden can be seen jamming out to Styles singing the One Direction classic 'Best Song Ever'.

In the wholesome footage, fans can be seen circling around the Gavin & Stacey star, with every fan holding their phone afloat to capture the moment.

As Corden leads the jamming session, the group go into a large mosh pit as Styles drops the beat.

Everyone - including Corden - can be seen singing every single word and generally having a whale of a time.

At the time of writing, the TikTok is approaching one million views less than 24 hours after it was uploaded to the video-sharing platform.

Many music lovers haver flocked to the comment section to give their thoughts.

"Omggg I love how he is just in the crowd," one person wrote.

A second added: "A mosh pit to best song ever is something I never knew I needed to see."

TikTok/@nkkarts

Meanwhile, a third remarked: "Love how he's just right in the action absolutely loving life!"

Styles and Corden have been good pals for a while, with the singer joining the TV presenter on the final episode of The Late Late Show earlier this year.

Styles, who once guest hosted the show, teased a One Direction reunion on the show’s iconic 'Spill Your Guts or Fill Your Guts' segment.

Corden asked: “Yes or no, will there be a One Direction reunion? Will it ever happen?"

Styles responded: “I would never say never to that. I think if there was a time where we all felt like that was what we wanted to do, then I don't see why we wouldn't.”

Never say never!