St. John was involved in the making of the soundtracks for Scarface, Superman III and Electric Dreams and two of her solo albums, Power To The Piano and Take Your Passion, were produced by Giorgio Moroder.
Superman | William III of England | George III of the United Kingdom | Henry III of England | George III | Edward III of England | Henry III | Edward III | Charles III of Spain | William III | Loudon Wainwright III | WTA Tier III tournaments | Richard III of England | Benigno Aquino III | Adventures of Superman | Lois & Clark: The New Adventures of Superman | Pope Alexander III | Star Wars Episode III: Revenge of the Sith | Henry III of France | Gustav III of Sweden | Adventures of Superman (TV series) | Shalmaneser III | Alexander III of Russia | Albatros D.III | Frederick III | Superman Returns | Rainier III, Prince of Monaco | Superman (1978 film) | Otto III | Frederick William III of Prussia |
In October 2001, 18 years after portraying Lana Lang in a feature film (Superman III), she returned to the Superman mythos in the role of Martha Kent, Superman's adoptive mother, in the television series Smallville.