[Photo by: Lindsey Byrnes]

Calling all Twenty One Pilots fans!

Read more: Twenty One Pilots changed the lyrics to “Stressed Out” and they're brutally honest

So you think you're a diehard tøp fan? Let's put you to the ultimate test, then. How well do you know the words to “Car Radio”? And don't forget, if you're not happy with your result, you can always study up and try again.