This isn't gonna help him book future gigs, that's for sure... Wireless Festival is losing some MAJOR sponsorships following the announcement that Kanye West is going to be a headliner. YIKES... After receiving backlash from music fans unhappy with the controversial musician being a part of the London festival's lineup, Pepsi announced it would be withdrawing its sponsorship from the event. A spokesperson for the brand told The Independent: "Pepsi has decided to withdraw its sponsorship of Wireless Festival.