Carpool Karaoke pretty much does what it says on the tin. Celebs get into a car, drive along with host James Corden and sing karaoke. A simple idea, true, but one that’s taken off in a major way. In fact, it’s now one of the most popular late-night segments on American TV. And a whole host of famous people have participated and sung their hearts out. It sounds like fun, and it’s fun to watch… but the Foo Fighters didn’t have fun filming it.