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Carpool Karaoke: Julia Roberts, George Clooney Join James Corden and Gwen Stefani (Video)

”Late Late Show“ host drives A-listers as they jam out to Queen

James Corden‘s new Carpool Karaoke took the star power to a new level, as he was joined by not only award-winning musician Gwen Stefani, but also major movie stars George Clooney and Julia Roberts.

Things started out with Corden and Stefani riding around LA, listening to some of her greatest hits like “The Sweet Escape.” But when Corden found himself in a time  crunch in order to get to work, he called on a few more people so he can use the carpool lane.

Enter Clooney and Roberts, who gamely joined in singing Stefani’s popular song “”Hollaback Girl.” Stefani said she couldn’t reveal who was the inspiration for the song, saying only, “I won.”

The quartet closed things out with a rendition of “We Are the Champions” by Queen, though Corden closed out the song with a solo.

Watch the video above.