Madonna has revealed another collaborator for her forthcoming album. The singer posted a picture of her working with singer Natalia Kills and producer Martin Kierszenbaum.

Martin Kierszenbaum was heavily involved in the creation  of Lady Gaga’s first two albums, while Natalia Kills has released two critically acclaimed albums.

Last month Madonna revealed she was working with Swedish DJ Avicci on new material.

The forthcoming album will be Madonna’s thirteenth album of original material, not counting her soundtrack albums for ‘Who’s That Girl’ and the ‘I’m Breathless’ collection in support of the film ‘Dick Tracy’.

Check out Natalia Kills tune ‘Trouble’ below.