Swedish sisters Johanna and Klara Söderberg, aka First Aid Kit, have always seemed wise beyond their years. The pair create gorgeous torch songs that belie the fact they're in their early twenties and late teens, respectively. After emerging with a beautiful cover of Fleet Foxes' Tiger Mountain Peasant Song in 2008, they've since recorded with Jack White (on a cover of Buffy Sainte-Marie's Universal Soldier) and Bright Eyes, and will support Lykke Li on her forthcoming UK tour. While their debut album, 2010's The Big Black and the Blue, relied solely on their immaculate harmonies and the warm thrum of an acoustic guitar, The Lion's Roar – produced by Bright Eyes' Mike Mogis – finds them experimenting with a full band, mixing country influences with campfire strumalongs. The title track – premiered here exclusively – starts with just Klara's voice and guitar, before the whole thing is swept along in a rush of harmonies, woodwind and galloping drums.

• The Lion's Roar is due on 5 December. The album follows on 23 January.