Nectarine 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).
Nectarine by Twin Sister is licensed under a Attribution-NonCommercial 3.0 International License.