Coldplay singer Chris Martin would ''do anything for Glastonbury'' and helped convince Beyonce Knowles to appear, according to its organisers.
The 'Run the World (Girls)' singer was apprehensive about signing up for the festival - one of the Europe's biggest - after her husband, Jay-Z's, inclusion on the 2008 bill proved controversial, but Chris helped talk her round, according to co-organiser Emily Eavis.
She told Radio Times magazine: "Chris is a bit wary of people knowing he's been so involved. I don't know why because it's actually cool.
"Chris is as loyal as they come - he'll do anything for Glastonbury. He's really an unlikely frontman. Most people are a bit more all-consumed with their own thing."
Emily said while Beyonce - who releases her new album '4' next week - has been keen to play since she saw Jay perform, they had to book her as early as possible.
Emily added: "Luckily, we spoke to Beyonce before she planned her tour this year, so she managed to put Glastonbury in her schedule, then build a European tour around it."