Future Islands, FKA Twigs, and Girl Band have all been added to the already-strong Primavera Sound 2014 line-up which is set to be headlined by the likes of Arcade Fire, Queens of the Stone Age, The National, Nine Inch Nails, Kendrick Lamar and more.

Primavera Sound takes place in Barcelona from May 29-31, get tickets and check out the full line-up here. Watch Future Island's ridiculously awesome Letterman performance below.

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