Lady Gaga and 'Eltoneo'

Lady Gaga's been putting the finishing touches to her duet with Elton John.

She tweeted her fans, "Eltoneo + Guliet! Finishing our duet Hello, Hello in studio. Sounding so amazing, some last finishing touches and off to the movies!"

The track will be used in the Disney film 'Gnomeo and Juliet' which is due out in 2011. The voices of James McAvoy and Emily Blunt will star in the movie.

Sir Elton and Lady Gaga performed together at February's Grammy awards (pictured), where they opened the event by playing three of their songs together.

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