With Whitney, filmmaker Nick Broomfield is exploring "the forces that made and then destroyed the singer" who defined an era of pop music.
Broomfield has made a reputation probing controversial subjects - from Kurt Cobain conspiracy theories in Kurt & Courtney to political corruption allegations in Sarah Palin: You Betcha!.
Houston's death from an accidental drowning in her Beverly Hills hotel room in 2012 stunned fans the world over, although substance abuse rumours had dogged her in her final years.
