Coverage of the opening ceremony to the FIFA World Cup in Russia produced an embarrassing moment for Fox Sports, which has issued an apology after U.K. pop star Robbie Williams flipped the bird on live TV, Deadline reports.

“The gesture came as Williams performed on the field at Luzhniki Stadium in Moscow ahead of the opening game between Russia and Saudi Arabia, which kicked off the tournament that runs through July 15. It apparently didn’t air in the UK but it very much did live on U.S. airwaves on Fox,” Deadline reports.

The report adds: “Williams’ hand move was hard to miss — the singer did it right into the camera that was in front of him while singing his hit ‘Rock DJ.’ He appeared to have altered the lyrics too — something about ‘I did this for free’ before letting the finger fly. He also glanced on the giant screens above the crowd as if to check out his, er, handiwork.”

The report quotes a spokesperson for Fox Sports saying today: “The 2018 FIFA World Cup opening ceremony was a newsworthy event produced by a third party and carried live on Fox. As it was broadcast live, we did not know what would happen during Robbie Williams’ performance and we apologize.”