Joséphine Baker was a great American star in France. J'ai deux amours, mon pays et Paris (1931) is a nice tribute to France and an homage to this great lady: reading her amazing life story in Wikipedia makes you want to learn more about her. When you visit the ugly Très Grande Bibliothèque in Paris bring a bathing suit and go swim into the small swimming pool located on the Seine in front of the TGB that is named after her.
The text in Wikipedia in French tells us about the authors and explains the song was her first public performance and an instant hit. Later it seems she changed the title to mon pays c'est Paris because she felt estranged from the US.