In a video directed by bandmate Jack White, Mosshart says: "I don't remember the first time I wrote in the car, I just notice that when I'm driving - especially on the highway - I just get ideas.

"There's something about that monotony and the speed and that weird level of concentration you have when you're driving that leaves a part of your brain open to that sort of stuff. I guess you're sort of amusing yourself because it's pretty boring."

As for why she doesn't record her ideas rather than risk running foul of the law, or having a crash, she says: "Here's the thing about tape recording yourself while talking - you never want to listen to it back. So it's better to write stuff down, it's a lot easier to look at."