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13 February 2014, 15:35
Haim, Interpol and Darkside have been added to the bill for this year's Open'er festival.
Open'er 2014 takes place in Gdynia, Poland 2-5 July 2014.
Pearl Jam, The Black Keys, Foals, MGMT, Phoenix, Daughter, Warpaint and Bastille have all already been confirmed.
Haim won Best Live Act in association with Radio X at last week's Fly Awards.