Saturday Night Live - Season 42Lady Gaga did more than just drive James Corden to work for "Carpool Karaoke" -- the pop star also crashed the rest of the latest "Late Late Show" episode.

When it came time for Corden to come out an deliver his opening monologue, Lady Gaga took the stage instead. Stealing the host's thunder and calling herself "Lady Haha," she started in on the usual topical jokes. Yet, she only got through a few before a pants-less Corden ran onstage to reclaim his show.

The two staged a faux argument over her supposed hijacking, but they quickly reached a compromise that viewers' loved: Gaga got to stay as part of the band. Naturally, she didn't have to hide away -- she performed one of the singles from her new album, "Joanne," and interacted with guests.
Another highlight of the show was Lady Gaga's "Carpool Karaoke" segment. Between that and her unexpected appearance, the audience got a healthy dose of Gaga.
"The Late Late Show with James Corden" airs weeknights at 12:37 a.m. ET on CBS.

The Late Late Show With James Corden TV Show Poster
The Late Late Show With James Corden
CBSTV14March 23, 2015
Based on 20 critics

The English actor interviews guests and hosts musical performances. Read More