Hmm... Where have we heard this before...
As you may have known, the 30-year-old singer filmed a Carpool sketch with the late night host and on Tuesday evening, we FINALLY got to see GaGa and James rock out to some of the pop star's hits like Bad Romance and Poker Face!
But the fun didn't stop there as Corden decided to try on a bunch of GaGa inspired costumes — oh, and the blonde beauty even busted out her pink hat to sing Million Reasons from her newest album, Joanne!
The celebs had more planned than just karaoke as the songstress also took over the funny man's hosting duties and delivered a bit of the monologue! And the best part?? The hitmaker asked Matt LeBlanc who he'd rather, Monica or Rachel… JUICY!
GaGa gets her karaoke on:
Lady GaGa hijack's James' show:
Don't forget to catch James' show when it airs weeknights at 12:37 a.m. EST on CBS!