So last year we had nine headliners
Wednesday - Kylie
Thursday - Halsey
Friday - Stormzy/Liam Gallagher
Saturday - Martin Garrix
Sunday - Janelle Monae/Sam Smith
Monday - Skrillex/Fred Again
So that’s roughly split into 3 dance acts, 3 commercial pop, 2 RNB/Hip hop and 1 indie/rock
My guess is:
Wednesday - Charli XCX
Thursday - Central Cee/Tiësto
Friday - Post Malone
Saturday - Hozier/Anyma
Sunday - Queens of the Stone Age/Fatboy Slim
Monday - Chappell Roan