Professor Green and Labrinth have teamed up with Charles Hazlewood for a Rap Slam competition.
The competition will be conducted via Twitter and Facebook before a livenevent on July 1 at the Orchestra in a Field festival at Glastonbury Abbey.
Young people are encouraged to choose a famous classical piece and then create a rap to go over it!
Three finalists will be shortlisted who will then perform in the Talk Tent at Orchestra in a Field.
For more information follow @rap_slam or visit http://www.orchestrainafield.com/