When Nancy is looking at the movies Dehlia Draycott had been in, several titles are names of Nancy Drew books.
When Nancy is searching for information on Dehlia Draycott, one of the websites she visits is IMDb.com. The 2006 rendition of Draycott's profile can be briefly seen on the screen of Nancy's laptop, at around 31 minutes and 24 seconds into the movie.
At the very start of the film, the camera closes in on a bookcase. All the books on that bookcase are Nancy Drew novels.
Nancy's research shows that Dehlia Draycott died of drowning in 1981 at the age of 43. This closely mirrors the real-life death of actress Natalie Wood, who drowned while yachting off Catalina Island in 1981, at the age of 43.
Bruce Willis: the lead actor in the fifties crime film (Nancy Drew is mistaken for an extra in the film).