Apple has just announced the headliners of the next iTunes Festival London, which will take place throughout the month of September and feature performances by Pharrell Williams, Kylie Minogue, Maroon 5, Beck, Blondie, Jungle and David Guetta, among others. Throughout the month of September, the Roundhouse in London will host a series of exceptional performers. Apple has now announced the dates for concerts by Beck (September 2), David Guetta (3), 5 Seconds of Summer (4), Kasabian (5), Robert Plant (8), Pharrell Williams and Jungle (10), Maroon 5 (11), Blondie and Chrissie Hynde (16) and Kylie Minogue (27).