Oh the wonders of the internet... remind me again what we used to do before we had the answer to every single question at our fingertips?
So you know this ad, well I really love the music in it, so of course I let my fingers do the typing and followed the link trail to this! The calypso/folk/pop music of Lord Huron. Now this is a very good example of my very eclectic music taste, but at the end of the day, it sounds like happy music to me, and that's what I love. Enjoy! (go to the 3.00 mark to hear the bit from the ad).