Danny Wallace heads to Worthy Farm in Somerset to mingle with the crowds and find out what music is providing the playlist to the 2009 Glastonbury Festival.
He takes a musical snapshot of the festival by asking some of the 130,000+ revellers what will keep them dancing 'til dawn on their mp3 players and campsite boom boxes.
Danny finds out what they're listening to and why - including embarrassing confessions and guilty pleasures - and some of the music will be interwoven with his festival chronicle.
And 6 Music is the home of Glastonbury on the BBC this year, clearing its schedules to offer continuous coverage during the festival hours of Friday, Saturday and Sunday. For more information visit bbc.co.uk/6music.