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ROSKILDE, DENMARK - JULY 04: Johanna Soderberg and Klara Soderberg from First Aid Kit perform at Roskilde Festival on July 4, 2015 in Roskilde, Denmark. (Photo by Rob Ball/Redferns via Getty Images)

ROSKILDE, DENMARK - JULY 04:  Johanna Soderberg and Klara Soderberg from First Aid Kit perform at Roskilde Festival on July 4, 2015 in Roskilde, Denmark.  (Photo by Rob Ball/Redferns via Getty Images)