Oasis' Noel Gallagher spoken out about the decision to put Jay-Z in the prime Sat night headline slot.
The Oasis frontman told BBC News that deviating from the festival's tradition of booking guitar-based headliners was "wrong".
"If it ain't broke don't fix it," he said. "If you start to break it then people aren't going to go. I'm sorry, but Jay-Z? No chance.
"Glastonbury has a tradition of guitar music and even when they throw the odd curve ball in on a Sunday night you go 'Kylie Minogue?' I don't know about it. But I'm not having hip hop at Glastonbury. It's wrong."