The Lumineers are a root revival band based out of Denver, Colorado whose music has been described as "heart-swelling stomp-and-clap acoustic rock, classic pop, and front-porch folk." Of course that's just artsy fartsy talk for awesome.
The Lumineers have been likened to Mumford and Sons and The Avett Brothers and indeed, if you love those bands then the soulful and raw sounds of The Lumineers will steal your heart.
The Dead Sea
Ho Hey (This is the song that's currently putting The Lumineers on the map)