Don't call them 'rockstars,' but right now, Imagine Dragons are one of the biggest bands in the world. However, it wasn't even that long before they were selling out arenas and dominating the music world that they were just getting their start.

Back in 2012, Imagine Dragons played the Aggie Theatre in Fort Collins, which is a humble stage compared to the shows they put on now in massive arenas. We may not have pyrotechnics, but hey, we'd welcome them back any time.

This week's throwback is before 'Believer,' 'Thunder,' and 'Whatever It Takes,' to April of 2012 at the Aggie Theatre in Fort Collins: