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Gwen Stefani performs during a 2015 concert in New York. The singer sang karaoke with George Clooney and Julia Roberts on the Late Late Show with Corden Image Credit: AP

Gwen Stefani got a little help from George Clooney and Julia Roberts in Late Late Show host James Corden’s latest Carpool Karaoke segment.

In the segment that aired early Thursday, Stefani and Corden take on a few of the former No Doubt singer’s classics before pulling over their SUV under the guise of needing a few more passengers to travel in a carpool lane. Corden calls up Clooney, who shows up and dials Roberts.

The foursome is then shown riding around belting out Stefani’s Hollaback Girl and Queen’s We Are The Champions.

Clooney and Roberts are co-starring in Money Monster, which opens later this month.