"O mein Papa" is a nostalgic German song, originally as related by a young woman remembering her beloved, once-famous clown father. It was written by Swiss composer Paul Burkhard in 1939 for the musical Der schwarze Hecht (The Black Pike), reproduced in 1950 as Das Feuerwerk (The Firework) to a libretto by Erik Charell, Jürg Amstein, and Robert Gilbert. In 1954 that musical was turned into the film Fireworks with Lilli Palmer.
The song was recorded in English as "Oh! My Papa" by a number of artists, including Eddie Fisher whose version was a number one hit in the US in 1954.