Grupo Fantasma (Group of Phantoms) hails from Austin, Texas and has a very interesting sound. While their original material is more upbeat most of the time, they do a great job of taking it down to a more intimate level. This eerie, yet beautiful cover of "Because" is one of my favorite things that they've done, plus it translates pretty well into Spanish. I always dig unique covers like this one.
Got any favorite covers? Maybe one in a different language from the original?