NEW YORK » “Late Late Show” host James Corden says he has no interest in taking over for his lead-in on CBS, Stephen Colbert.

Colbert’s “Late Show” brought in a new executive producer in April and has been running neck and neck with ABC’s “Jimmy Kimmel Live” in the ratings behind NBC’s Jimmy Fallon. Of the possibility of replacing Colbert at 11:30 p.m., Corden tells Howard Stern “that’s never going to happen” and that Colbert’s show “is working.”

Corden also touched on the origins of his wildly popular “Carpool Karaoke” skits, which feature Corden driving alongside singers like Adele and Justin Bieber belting out hits. He tells Stern his first-ever guest on the segment, Mariah Carey, initially told him she wasn’t able to sing before joining in once Corden put her songs on the stereo.