Amason

Spotify's biography describes them as a Swedish supergroup, with members from Miike Snow, Dungen, Little Majorette, and Hajen/Idiot Wind.  I think their idea of what comprises a supergroup may be a little bit different from mine.  That being said, this is really nice indie pop.  "Went to War" is by far their most popular tune on Spotify, at over 2.5 million spins.

That is a wonderful track.  Really pretty stuff.  And their other tunes from 2015's Sky City show a similar pop sensibility while still retaining their indie-ness.  Oh, and a lot of their songs are sung entirely in a scary language that is heavy on the umlaut.  Here is "Duvan," also from that 2015 album:

I don't understand what is going on with the blowing hair people in the video, other the weird JibJab looking band members, but its a damn pretty song.  Pretty chill music for a festival, but if they play at the right time of day, it might be a nice way to spend part of an afternoon.