Madonna has worked with Natalia Kills on eight new songs.

The British singer-songwriter was pictured in the studio with the US pop icon earlier this year, and has shed some light on their time working together.

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"She writes incredible lyrics, sings beautiful melodies, but most of all she is so f**king funny," Kills told Paper magazine.

Asked how Madonna came to know about her work, Kills explained: "Madonna's dancers play my music during her rehearsals and workouts every week."

What's more, Kills also revealed that she has plans to release her own new music in the near future.

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"I'm really excited for my new music," she said. "It's funny, but co-writing songs for world-renowned pop stars has allowed me to be more obscure and inappropriate with my own sound.

"It's coming out all this year. All really soon, really really soon, wink wink, very very soon."

Madonna is expected to release her 13th studio album in 2015.