Moon over Parador

Moon over Parador is a 1988 romantic comedy film, starring Richard Dreyfuss, Ral Juli and Sonia Braga. It is a remake of the 1939 film The Magnificent Fraud, based on the unpublished short story entitled Caviar for His Excellency by Charles G. Booth.

In the beginning, while both the President and Jack are in the scene, the President is played by Dreyfuss older brother Lorin.During a scene where Jack has to address the crowd as the Paradorian President, he adlibs his lines and uses the text for the song The Impossible Dream from Man of La Mancha. Sammy Davis Jr.s rendition of Paradors national anthem is sung against the music for Bsame Mucho. The previous Paradorian National Anthem O Parador is sung to the tune of O Christmas Tree. ........

Source: Wikipedia