What was Twenty One Pilots' career-defining moment?

Twenty One Pilots are quite literally taking over the world. From spending weeks atop Billboard's artist chart to selling out massive arenas, the duo have had an amazing year—and they show no signs of slowing down.

With that said, as 2016 comes to a close, we want to hear from you—their fans. 

What do YOU think was the moment that defined Twenty One Pilots' career?

Tell us your thoughts in the form below! (Note: Responses in the comments will not be considered.)

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