(AllHipHop News) A new documentary at this year’s Sundance Film Festival will receive a well-known co-sign, courtesy of Hip-Hop Soul queen, Mary J. Blige. The Associated Press reports the singer is lending her support to The Invisible War, a documentary that examines the trauma suffered by female and male victims of rape at the hands of their military colleagues and the difficulty they have in prosecuting their attackers. Blige was on hand Friday (January 20) for the film’s premiere at Sundance. Amy Ziering, the film’s producer, confirmed Blige’s involvement, telling the AP that the vocalist would write an original song for the film after the Sundance festival. The new song will join another tune from the Grammy winner, “Need Someone,” which is featured in the closing credits of The Invisible War. “Need Someone” is taken from Blige’s latest album, My Life II… The Journey Continues (Act 1).   News of Blige’s original song marks the latest soundtrack entry for the songstress, who was recently nominated for a Golden Globe award for her song, “The Living Proof.” The Underdogs-produced track is included in the film, The Help.