Whitney Houston's final film will hit theatres on August 17th, the film's producers announced SUnday, after the pop icon passed away Saturday.  Titled "Sparkle," the film stars Houston as a mother of three sisters in a Supremes-like group who struggle with the temptations and hardship of touring musicians, and is a remake of a 1976 film of the same name.  The film also stars Jordin Sparks, Cee Lo Green and Mike Epps.  Houston also contributed to the film's soundtrack, for which a release date has not been set.