CHICAGO—R. Kelly, Bjork and Belle and Sebastian are among the musicians headlining this year's Pitchfork Music Festival.

Festival organizers announced the three headliners on Friday. They say the full lineup of dozens of acts will be released in coming weeks. The three-day festival has been running for eight years at Union Park in Chicago. About 50,000 people attend.

This year's festival will be July 19-21.

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