Pop sensation and X Factor USA judge Britney Spears has treated her fans to the exciting news that a duet between herself and music mogul Will.i.Am is "coming soon".

Writing on her official Twitter page earlier this evening (August 27), Spears explained to her 19.8 million followers that the track is on its way:

"Can't wait for y'all to hear @iamwill's next single featuring me. Coming very soon. Stay tuned people...."

She also spoke about the upcoming Mars broadcast of Will.i.Am's exciting new song, 'Reach For The Stars', and added: "Just left the studio w/ @iamwill working #willpower. Look out 4 #reachforthestars beamed 2 earth from mars tmrw via my friend @MarsCuriosity."

Will.i.Am's track will be broadcast on the red planet tomorrow (August 28) and NASA will also "hold an educational event to share findings about Mars with students".

Watch Spears' video for 'Till The World Ends' below: