Gov Ball 2026 Lineup Leaks Spark Chaos: Is Taylor Swift or Oasis Headlining? A viral rumor claims the Gov Ball 2026 lineup will feature either Taylor Swift or a reunited Oasis as the top headliner, but organizers have not confirmed either act. The speculation, fueled by a fake screenshot of a “leaked” poster, has fans debating what’s real—most likely, neither star has been booked, so treat this as hype unless an official announcement drops.