Au Revoir Simone is band from Boston and it consists of Erika Forster, Annie Hart and Heather D’Angelo. I love their beautiful music with beautiful lyrics. I also adore their style, it's so beautiful and chic and still quite simple. They also have amazing press-photos! Au Revoir Simones homepage can be found here and their Last.fm page here.
This video is so amazing, I want to spend a day like that too!
(For some reason it doesn't show fully here, so I recommend clicking it to see it in YouTube)