Unforgettable may have a generic title, and it may be a train wreck, but it’s a watchable train wreck throughout.

At the helm for the first-time, and working from screenwriter Christina Hodson’s slick balancing act of aspirational romance and dark psychology, longtime producer Di Novi enlivens the generic mix with a tinge of camp and a sure grasp of mean-girl dynamics.

It’s all glossily camped-up nonsense with an amusingly inappropriate title, but luridly – and ludicrously – entertaining nonetheless.

Framed like a phantom in black shadow and silvery silhouette by legendary cinematographer Caleb Deschanel (“The Right Stuff”), Heigl slices through this silly little universe, consumed with her mission, bigger than all of it.

If this hits, and it could, we could see a whole new chapter in Heigl’s struggling, diva-damaged big screen career. No more frothy, ill-conceived romances, just scary Joan Crawford/Barbara Stanwyck/Bette Davis/Theresa Russell minxes, black widows and back-stabbers. Why couldn’t she become the movie woman America loves to hate?