Following reports that Goldfrapp, Ladytron and Le Tigre would feature on her forthcoming album, Christina Aguilera has revealed that she has also collaborated with M.I.A. and Santigold for the release.

Aussie pop singer Sia has also contributed to the album. Christina spoke to APE Radio, saying that the album was near completion, and added that she loved working with Sia and 'so enjoyed her company.

She also said, "I know I can't let too much out the bag too soon... I just can't, 'cause I really want you guys to be surprised and to experience firsthand what I'm talking about"