The latest arrival to the list, I first heard Fanfarlo a couple of week's back on NPR's All Songs Considered Year-end Review. I was hooked. After listening to it a few more times, I was more hooked.
Sounding very much like The Arcade Fire (with the multiple instrumentation), it also reminds me a ton of The Delta Spirit (who made last year's list). Just a lot of energy, driven by the foot-stomping, hand-clapping percussion. Probably my favorite find of 2009, and it happened in late December. If I make this list 3 weeks ago, you may have never heard of Fanfarlo either.