The Foo Fighters' appearance at this year's Glastonbury Festival – under the mysterious pseudonym The Churnups – was perhaps the worst kept secret in the history of secret shows.
It's not the first time Foo Fighters have deployed musical subterfuge and played under a different name – in 2014 they performed a series of intimate shows billed simply as The Holy Shits. They're also not the only major band who've tried it, either – from Green Day to Metallica, it's become something of a rite of passage for huge artists to go cloak and dagger and sneak onto a stage in front of a mere couple of hundred people.
