LONDON--(BUSINESS WIRE)--Apple® today announced that Pharrell Williams, One Direction, Florence + The Machine and Disclosure are among the headliners at the 2015 Apple Music™ Festival at London’s Roundhouse this September. Apple will broadcast performances to music fans around the world for free, which can be viewed live and on-demand on Apple Music. The Apple Music Festival lets fans get even closer to their favorite performers with coverage on Beats 1℠ alongside backstage news and footage str