Kodaline is a band based out of Dublin, Ireland (yay, sexy accents). They've been active for several years but prior to 2011 were known as 21 Demands. Not sure why the name change happened, but it seems to be a wise choice.
The group consists of Steve Garrigan (vocals, rhythm guitar, mandolin, harmonica, keyboards), Mark Prendergast (lead guitar, BGVs, keyboards), Vinny May (drums / percussion, BGVs), and Jason Boland (bass guitar, BGVs), and they won the EBBA Public Choice Award in 2013.
At any rate, take a listen to the song above. There's even a Part 2 if you feel so inclined.