Part of the AFI 100 Years… series, AFI's 100 Years…100 Songs is a list of the top 100 songs in American cinema of the 20th century. The list was unveiled by the American Film Institute on June 22, 2004, in a CBS television special hosted by John Travolta, who appeared in two films honored by the list, "Saturday Night Fever" and "Grease".
Some of the songs were written before the turn of the 20th century.
It is not known when the songs were written only that they were used in film during the 20th century. The system did not understand what was meant by the turn of the century.