Apple have just released a one minute trailer of their Carpool Karaoke series, and with it comes a bit more information about the upcoming episodes.
Hollywood Reporter said last year that Apple had ordered 16 episodes, and we now know that they won't all be hosted by James Corden. There may be people on multiple episodes still though, as they only mention 13 celebrities "and many more". However they did say specifically "celebrity pairings", so this seems like they're moving the series away from a host/guest structure.
The thirteen celebrities already confirmed are: James Corden, Will Smith, Billy Eichner, Metallica, Alicia Keys, John Legend, Ariana Grande, Seth MacFarlane, Chelsea Handler, Blake Shelton, Michael Strahan, John Cena, and Shaquille O’Neal.
The series as we expected, will be available exclusively on Apple Music. I'm quite looking forward watching these, and also whether Apple can go on to create/produce/purchase even more content.
Update: Apple have now released a second video, showing more of the series content!