First Aid Kit, the Swedish folk duo comprised of sisters Johanna and Klara Söderberg is celebrating the release of its Third Man Records Blue Series 7-inch that was released today. The two young songwriting Swedes had the great fortune of recording at Jack White’s Third Man Studios in Nashville under the production guidance of the big boss man himself. The single is made up of two covers, one is Buffy Saint-Marie’s “Universal Soldier” and the other being the classic blues standard “It Hurts Me Too,” based off the version popularized by ’60s folk singer Karen Dalton. The latter—recorded live at the Rockwood Music Hall during 2010′s CMJ Music Marathon & Film Festival (see the duo on CMJ TV)—features their father playing fiddle and Jack White’s band backing them.

The sisters started writing songs and harmonies back in their pre-teen years. First Aid Kit had a big year in 2010, releasing its debut album The Big Black And The Blue, touring Australia and the United States, and making stops at SXSW and Austin City Limits. And it played to sold out shows at CMJ, naturally.