This is a karaoke classic!

James Corden had a special passenger in his car during his journey to the CBS studios on Wednesday, March 25 — none other than ultimate diva Mariah Carey.

PHOTOS: Mariah Carey's bikini body

And while Carey kept Corden company as he traveled to work to film The Late Late Show, the duo decided to put the radio on for an impromptu sing-along.

Turns out Corden's radio was pre-tuned to a Mariah Carey music station, blasting out the "Hero" singer's chart-topping tracks, one after the other, from “Fantasy” to “Vision of Love” and beyond.

Despite initial protestations that she was too tired to join in, as soon as Corden started hitting her top notes, the performer just couldn't help herself.

This video is better than words could ever describe! Watch the whole thing above and check out Corden's pure glee as he riffs with Carey in a word-perfect karaoke gold moment!