No details were given regarding the track, or its title, although it should be noted that director Peter Jackson used female singers for the end credits songs on The Lord of the Rings: Fellowship of the Ring, The Lord of The Rings: The Two Towers, and The Lord of The Rings: The Return of The King.
It isn't known when the full soundtrack will be released for The Hobbit: An Unexpected Journey. The CD soundtracks for Peter Jackson's first three Middle Earth adventures were released either at the end of November or the beginning of December.
The Hobbit: An Unexpected Journey was released December 14th, 2012 and stars Ian McKellen, Martin Freeman, Richard Armitage, Ken Stott, Graham McTavish, William Kircher, James Nesbitt, Stephen Hunter. The film is directed by Peter Jackson.