The Civil Wars
The Civil Wars is a duo composed of singer-songwriters Joy Williams and John Paul White. The two met during a Nashville, Tennessee songwriting session in 2008. After releasing a live performance album and a four song EP, their full-length album, Barton Hollow, was released in 2011. The band won the Grammy Award for Best Country Duo/Group Performance and Best Folk Album in 2012. The duo went on a hiatus in November 2012.
source: Wikipedia