This Swedish folk duo is comprised of sisters Johanna and Klara Söderberg, barely in their twenties, but already with the calming, melodic voices of much older souls. Their harmonies will have you swooning, and if you're lucky enough to hear their cover of the Fleet Foxes' "Tiger Mountain Peasant Song," there might even be tears. Although that cover propelled them into the world of Internet sensations, you might know them for their albums The Big Black & The Blue and The Lion’s Roar, or for their four Swedish Grammi awards. Catch them on their eighth tour and enjoy performances from their newest album, Stay Gold, released in June 2014 by Columbia Records. Expect the usual sweet melodies combined with some new sounds, including a thirteen-piece orchestra.