The singer?s producer Stuart Price has revealed the pair are currently working on a new record and has promised fans it will herald a ?new sound? for Madonna. He has also revealed that the duo have enlisted the services of some of the biggest names in music. He said: ?We have been working with some of the top producers that are in fashion right now. Although Price is refusing to divulge the names, rumors are that both Timbaland and Pharrell Williams could be among the collaborators.