via Billboard After an afternoon of back and forth,Dionne Warwick says that Lady Gaga will be playing a role in Warwick's biopic. At HFPA FilmAid party in Cannes, the legendary singer told The Hollywood Reporter  that the pop star will, in fact, be in the movie that will center on her life.  As Warwick explained, the confusion was rooted in the fact that Gaga's music reps were the ones that knew about the deal, and not her film reps. "It is just a question of the right hand not kn