Arcade Fire debuted a new song at their concert in London's Hyde Park.
The Canadian band played Speaking In Tongues, which lead singer Win Butler said they'd only played once before - at the sound check.
After the performance he said: "Hands down that was the least scared we've been doing a song we've only really played in rehearsal to 60,000 people, so thank you so much."
The seven-piece did a storming set, taking in songs from their latest album The Suburbs along with their previous albums Neon Bible and Funeral.
Win said: "This has been so much better and so much more fun than we ever could have imagined."
They were supported by Beirut, Mumford And Sons and The Vaccines.
The Montreal-based band, who are picking up the Hard Rock Ambassadors Of Rock award today at the Silver Clef awards today (Friday), also revealed that they've brought their own personal chef with them on tour.
Speaking to Absolute Radio's Geoff Lloyd, Win said the band were "mindful of trying to eat healthily" so decided to bring along a chef named Fiona.
He said: "We actually figured out a trick, since there were so many people and it costs so much to feed us, that if we bring someone to cook for us it costs the exact same amount of money."
But he added it was sometimes difficult for her: "You're in the middle of a field in Germany with only mud and bread, and you have to figure out how to make a delicious meal."