With Phoenix, Pearl Jam, and The Black Keys as their set as its headliners, Poland's Open'er Festival's is already looking strong. They've steadily been announcing other highlights over that last few weeks, and joining the list of other acts that already includes Foals and MGMT today are psych-producers Darkside, Californian sunshine sisters Haim, and indie rock immortals Interpol, who stepped into legend with their debut album Turn on the Bright Lights 12 years ago this August.

Open'er Festival takes place from 2-5th July 2014 at Gdynia, Gdynia-Kosakowo Airport, tickets are on sale now. Check out the currently announced line-up here.

Wanna hear a continuous stream of music on the site? Check out 405 Radio, or our New Music section. Both are filled with great music.