On its surface, "The Other Woman" is a very welcome thing: A movie starring talented, funny women with their own punch lines and everything. In the movies, this is bizarrely rare. But what do the stars in "The Other Woman" — Cameron Diaz and Leslie Mann, along with a side of model-turned-actress Kate Upton — do the whole movie? Gab about a guy. "The Other Woman" is a slick hell-hath-no-fury comedy of female revenge, peppered with cheap and unimaginative toilet humor, but it's elevated somewhat by the fine comic duo of Diaz and Mann.