I love, I love, I love my calendar girl
Yeah, sweet calendar girl
I love, I love, I love my calendar girl
Each and every day of the year

Calendar Girl, Neil Sedaka

Long before things like feminism and political correctness ruined all the fun, it was generally accepted and encouraged to refer to actresses and various female stage performers by their embarassing and demeaning nicknames - The "It" Girl, The Oomph Girl -- which were usually dreamed up by the advertising department of the movie studio the actress was signed up with. In the silent era, before the star system was firmly in place and actors were often anonymous placeholders, it was also customary to name the most popular actresses after the (now defunct) studio which produced their films -- The Biograph Girl, The Nestor Girl. Then again, some of these were put in place the old fashioned way, invented by the general public.

Input is always welcome, please /msg me if I left anyone out.
I realize the nodeshell title is kinda goofy, please feel free to suggest an alternative title.
Most information compiled from the IMDb, namely "cat biographies.list | grep ^NK | grep -i girl"