First Aid Kit are Joanna and Klara Söderberg from Sweden.
If you haven't heard them yet, they sing incredibly perfect harmonious folky vocals and can also write gutsy songs to boot. Their acclaimed album 'The Lions Roar' has just come out and is well worth a listen if this is your bag (and it normally wouldn't be mine!). A small gig at Rough Trade to launch the album consisted of a few of the album tracks mixed with a couple of excellent covers.
One of which being 'When I Grow Up' by Fever Ray. Check out that cover HERE.
Have a listen to the album if you get the chance - big things!!
HERE's their website.