It's a shock to see that Lindsay Lohan, even with her boundless flair for self-destruction, would sign on for a grisly piece of torture porn. And really, did she have to choose such a gruesomely tawdry and inept one? She plays Aubrey, a virginal college fiction writer abducted by a psycho who saws off an extremity or two. Lohan then reappears as a former pole dancer (her career gone with the limbs), but is she still playing Aubrey? Or her id? Or, yes, her ''stigmatic twin''? I Know Who Killed Me is beyond bad it's just wrong.