Gwen Stefani Sings “Hollaback Girl” with George Clooney and Julia Robers in Car

I don’t know why Gwen Stefani, George Clooney, and Julia Roberts are in the same Chevy Tahoe, but this video just made the internet a little funnier. They say that the average attention span of an internet troll is a few seconds, there’s one exception: putting a new twist on famous songs you grew up with. James Corden’s Carpool Karaoke segments have picked up a lot of steam after successful episodes featuring Adele and Jenn…