Lady Gaga sings for "The Great Gatsby"

Co-written by her and Prince; Lady Gaga is preparing for the theme song of Baz Luhrmann's "The Great Gatsby" which is due to hit theaters in May 2013 instead of the New Year's eve.Starring Leonardo DiCaprio, Carey Mulligan, Toby Maguire, Isla Fisher and Bollywood star Amitabh Bachchan; "The Great Gatsby" is about an ambitious young man born and raised in the west who then moves to New York and fascinates the life of a distant relative, Jay Gatsby.According to Adelaide Clemens, who also acts in the film; Lady Gaga and Prince have a few music pieces that they will add to the film and that Luhrmann has agreed with other writers to write more songs for the film.