james corden
Rumours gathered pace after a gossip site noted how all five boys happened to have a break in their schedules around the time of James’ final show.
The Late, Late Show host has seemingly called on a seriously impressive A-list pal to make sure Carpool Karaoke goes out with a bang.
"I hope I never, ever work with you again," Craig Duncan said in a YouTube video about the Late, Late Show host.
The Kill Bill singer isn't the only star to say no to Carpool Karaoke.
When introducing James Corden to the stage, Trevor seized the opportunity to make light of one of Prince Harry's more candid admissions.
"If I want to do this other work, that cannot be at the expense of our children and our family," the Gavin & Stacey star explained.
The Gavin & Stacey actor felt he was "too young to do it justice".
The Late Late Show host claimed he and "every single person in London auditioned" for the hit film.
We're afraid it's also more bad news for a certain British US talk show host.