One song ... that's actually very difficult.
I think I easily thought about this for half an hour now...
But I think I have found it:
http://www.youtube.com/watch?v=pEa6_PYc7N4&feature=related
Matenda - Croatian Diaspora
Nevermind the title though, it is not fitting to me. I am not croatian or anything.
The sound, though, describes me well. Easy to understand, nothing complex. Lightly melancholic, but carrying an uplifting side in itself aswell. And I love how the finish slightly indicates that the whole thing's gonna repeat itself over and over. Very nice. Plus it was made from one of my favourite artists