Frederica (French: Frédérica) is a 1942 French comedy film directed by Jean Boyer and starring Charles Trenet, Elvire Popesco and Jacqueline Gauthier.

Gilbert Legrant a singer and owner of a cabaret is financially bailed out by his girlfriend Lilette.

However, she is outraged when she discovers love letters written by him to a woman named Frederica.

Frederica is in fact a fictional creation of his ideal woman, but Lilette doesn't believe him.

Gilbert's friend gets his own girlfriend Claudine to pose as Frederica, while in turn a real Frederica arrives from Davos causing further confusion.