The 'Boom Boom Pow' hitmakers want to work on new material at the world famous music event in Somerset, England, on Sunday (28.06.09) so have requested pounds worth of recording equipment.
A source told Britain's Daily Mirror newspaper: "The band are so excited about performing at Glastonbury. They love to be able to remix and make new tracks wherever they go so they have demanded they have a mini studio on their bus to capture the moment."
The band - made up of Fergie, will.i.am, Apl and Taboo - have also requested lots of festival-type food as well as meals for health-conscious Fergie.
The source added: "They really want to get into the UK festival spirit and have asked for traditional cider and a gourmet selection of festival-style food such as fancy falafel, special burgers and ice-cream.
"But Fergie still wants to keep up with her healthy diet while on the road so there will also be huge fresh salads, skinless free-range chicken, sun-blush tomatoes and giant platters of vegetable crudites."
The group will be flown to the festival in a helicopter after flying into London from France on a private jet.