George Clooney and Julia Roberts Join Gwen Stefani for Carpool Karaoke

On The Late Late Show with James Corden, Gwen Stefani took part in the shows wildly successful segment, Carpool Karaoke. And while the pop punk star and Corden were rolling around town, they ran into some "traffic." In order to use the carpool lane and avoid the traffic they need to add two more passengers. Fortunately Corden was able get George Clooney to ride with them. And Clooney called up his Ocean's 11 franchise co-star, Julia Roberts.