Famous as one half of the multi-Grammis-Award-winning Swedish folk music group First Aid Kit, she formed the band with her younger sister, Klara, during the first decade of the 2000s. Her band's hit songs include "The Lion's Roar," "Emmylou," and "My Silver Lining." She and her sister began their music careers by posting original songs and covers on MySpace and YouTube and by airing their acclaimed early track, "Tangerine," on a Swedish radio station. First Aid Kit's first EP, Drunken Trees, was released in 2008.