"If you're here anyway, why aren't YOU hosting the show?" a confused Harry Styles asked usual Late Late Show host James Corden.
The pair did some Carpool Karaoke on their way to the television studios and sang "Watermelon Sugar" before the former One Direction band member wondered why he'd host the show if he's rolling up to film with the host on site already! LOL... still a fun car ride.
What's more fun was watching Harry meet up with ex-girlfriend Kendall Jenner for the first time since the MET GALA in May to play a game of "Spill Your Guts or Fill Your Guts." Basically they had to ask each other some tough questions and either "spill the tea" or decide if eating some gross – we'll say "food" – was a better option. Interesting that the Top-Payed Supermodel wasn't willing to reveal to her ex which other celebrity has shot their shot in her DMs.
Harry also performed his new single "Adore You."