Adele joins James Corden for last ever Carpool Karaoke

Adele has joined James Corden for his final Carpool Karaoke in his last week as host of the The Late Late Show.

The singer appeared to surprise the star at his house in Los Angeles, waking him up by clashing cymbals over his bed.

He then agreed to let her drive him to work at CBS Studios. Along the way, they discussed their friendship and his career in the US at length.

Both stars became emotional about his decision to return to England.

Corden was a relative unknown to US TV audiences when he took over The Late Late Show in 2015 replacing Scottish-American comedian Craig Ferguson.

Carpool Karaoke quickly became the show's breakout hit, and Corden's first team-up with Adele ended 2016 as the year's biggest viral video.

"I've never lived in LA without you guys so I'm a bit nervous about it, to be honest with you, and very very sad," Adele said in the latest instalment.

During their conversation, Corden revealed the difficulties he had in persuading celebrities to take part in Carpool Karaoke when it first began.

They eventually got Mariah Carey to agree - but before she got in the car she told him she would "do the chat" but she would not sing.

Corden knew he had to convince her to change her mind to make a success of the feature - and he succeeded.

A failed attempt to prank Adele for The Late Late Show was also revealed in their conversation.

And they discussed Adele's I Drink Wine, the first verse of which was inspired by a long heart-to-heart with Corden.

She said they had a six-hour conversation as they travelled home from a holiday together with their families.

"You seemed down. You didn't feel strong," Adele told Corden.

A few weeks later she wrote the first verse to I Drink Wine and sent it him.

"It was everything I was feeling that day," Corden said.

"I was floored by how you'd managed to take everything that I was feeling about myself and life and just put it in a verse.

"It was the greatest privilege from a conversation so honest between two friends. That you could create such a thing, it just blows my mind."

Over the year, Carpool Karaoke Subsequent has seen appearances from Madonna, BTS, Blackpink, Britney Spears, Paul McCartney, Celine Dion, Billie Eilish and Elton John.

However, the idea actually dates back to 2011, when Corden took George Michael for a spin as part of a sketch for Comic Relief.

The format was later commissioned as a standalone series for Apple TV. Corden only took part in a handful of episodes, with later instalments pairing celebrities together instead, Highlights included Jason Sudekis and the Muppets; Miley and Billy Cyrus; and Kendall Jenner with Hailey Bieber.

During his stint on The Late Late Show, Corden also found time to film roles in Hollywood movies like Ocean's 8, Yesterday and Cats, as well as hosting the Tony and Grammy Awards.

He announced his intention to step down last year, saying: "When I started this journey, it was always going to be just that. It was going to be a journey, an adventure. I never saw it as my final destination, you know? And I never want this show to overstay its welcome in any way."

His final show is set to have both Harry Styles and Will Ferrell as guests.