I Want a House by Twin Sister
This Long Island NY-based group's debut EP, freely released in 2008, instantly won over a world of fans with its experimental acoustic pop sounds.
In 2010, Twin Sister released a their debut album, Color Your Life.
All of Twin Sister's music is licensed under a Creative Commons Attribution-NonCommercial license that encourages you to remix, and they even go so far as to post stems to their songs on their website (link).
I Want a House by Twin Sister is licensed under a Attribution-NonCommercial 3.0 International License.