The 'Late Late Show' host says he and Perry 'talked it all out in the car.'
The 32-year-old singer said she was 'honored and thrilled' to be the first judge announced for the 2018 revival.
The 32-year-old appears on Tuesday's episode of 'The Ellen DeGeneres Show.'
Katy Perry Coyly Addresses 'American Idol' Judge Rumors: I'm Good at 'Constructive Criticism'
The 'Wrecking Ball' singer opened up to KTU's Cubby and Carolina Bermudez on Tuesday about her close friendship with Katy Perry.
Miley Cyrus Opens Up About Close Friendship With Katy Perry, Says Singer Wrote 'I Kissed a Girl' About Her
The singer filmed her 'Carpool Karaoke' segment on Monday, and one lucky passerby managed to share a quick glimpse to Instagram.
The pair hit the streets of LA to shoot another installment of the hit 'Late Late Show' segment, which will air May 22 on CBS.
ABC announced the 'Witness' singer has signed on to the singing competition show at the network's Upfront presentation in New York City on Tuesday.
'Idol' alum Chris Daughtry also reportedly in talks to be a judge on the revamped competition show, which will debut on ABC in March 2018.
The news comes after a report claims the pop star is being considered to judge the new 'American Idol.'
Cyrus released her new single on Thursday, along with a music video.
The 'Chained to the Rhythm' singer is enjoying vacation with her friends.
Perry and Swift have longstanding issues. Perry describes her new album as "empowered."