Millions know their voices, but no one knows their names. In this compelling and very watchable documentary, award-winning director Morgan Neville shines a spotlight on the untold true story of the backup singers behind some of the greatest musical legends of the 20th and 21st centuries. Triumphant and heartbreaking in equal measure, the film is both a tribute to the unsung voices who brought shape and style to popular music and a reflection on the conflicts, sacrifices and rewards of a career spent harmonizing with others. These gifted artists span a range of styles, genres and eras of popular music, but each has a uniquely fascinating and personal story to share of life spent in the shadows of superstardom. Along with rare archival footage and a peerless soundtrack, “20 Feet From Stardom” boasts intimate interviews with Bruce Springsteen, Stevie Wonder, Mick Jagger and Sting to name just a few. However, these world-famous figures take a backseat to the diverse array of backup singers whose lives and stories take center stage in the film. Extras: TBA. Vitals: Director: Morgan Neville. Stars: Darlene Love, Merry Clayton, Claudia Lennear, Lisa Fischer, Judith Hill, Bruce Springsteen, Sting, Mick Jagger, Stevie Wonder, Bette Midler. 2013, CC, MPAA rating: PG-13, 91 min., Documentary, Box office gross: $4.730 million, Radius-TWC.