Music director Kim Gavin said that the August 12 ceremony will be a "fabulous" collection of contemporary stars, as well as classical composers such as Elgar and Holst.
"Without saying we have booked anyone, it goes from Elgar to Adele," he teased. "It is not just a pop concert, it is not just a classical rendition. It will be everything that we think is fabulous about British music."
Gavin added: "We are taking a box of fabulously well-done tunes. We are putting them together to write one piece of music that is fabulously balanced."
"Usually it is something classical but in this case it is an elegant mash-up of British music," The AP reports him as saying. "It will not be just about the music but also about what makes Britain great. We are trying to introduce something that is an absolute melting pot of British creativity."
Danny Boyle is tasked with creating the London 2012 opening ceremony, while Underworld were appointed as musical directors in December.
Sir Paul McCartney, Elton John, Muse, X Factor winners Little Mix and Britain's Got Talent gymnastic troupe Spelbound have all been tipped to appear at the July 27 event.
Ronnie Wood confirmed last week that he has been approached to perform at both ceremonies with The Rolling Stones and The Faces.
Watch Adele perform 'Rolling In The Deep' at the Brit Awards below: