Imagine Dragons is a great band.  I can't believe they came from Las Vegas, Nevada.
My little sister really likes them.  I have never heard them.
They really gained popularity after their debut album "Night Visions" was released in 2012.  That spawned all of the annoying covers of "Radioactive" on YouTube.
I think I have actually heard Radioactive.. or at least I have heard an annoying cover or two.
It took around 3 years to record "Night Visions" . . . it was recorded between 2010 and 2012.  The band produced the album themselves.