"Mamy Blue" is the title of a 1970 Hubert Giraud composition. Originally written with French lyrics, the song was rendered in English in 1971 to become an international hit for the Pop-Tops, Joël Daydé () and Roger Whittaker. A hit in France in its original French for Nicoletta, "Mamy Blue" was also rendered in a number of other languages in cover versions recorded by a good number of local recording artists across continental Europe, while a "local cover" of the English-language version by Charisma reached #1 in South Africa. The song's title is generally spelled as "Mammy Blue" in the English-speaking world.

The song was originally written with French lyrics in 1970 by veteran French songwriter Hubert Giraud; he conceived the song in his car waiting out a Parisian traffic jam and had completed its demo within a few days. After four months the first recorded version of "Mamy Blue" was made - with Italian lyrics - by Ivana Spagna marking that singer's recording debut.

In May 1971 Alain Milhaud, a French record producer based in Spain, acquired the song for Pop-Tops, a Spanish group he managed. Milhaud produced the Pop-Tops recording of "Mamy Blue" in a session in London after the group's frontman Phil Trim wrote English lyrics for the song. The French Barclay label expediently had the song covered by both Joël Daydé () and Nicoletta: the Daydé version - featuring Phil Trim's English lyric - was recorded at Olympic Sound Studio in London and the Decca Studio in Paris with Wally Stott as arranger, while Nicoletta's version was produced by Hubert Giraud and was the first recording of the song with Giraud's French lyrics.

The Pop-Tops and Joël Daydé () both reached #1 on the French charts with "Mamy Blue" while the Nicoletta version rose as high as #4 affording the singer her career record. Both the Pop-Tops and Daydé versions became concurrent major hits in several other territories including Belgium where the Pop-Tops and Dayde's versions reached #1 on respectively the Dutch and French chart with Pop-Tops reaching #3 on the latter, the Netherlands where Pop-Tops reached #3 and Daydé #13, Norway where Pop-Tops reached #1 and Daydé #3 and Sweden where Pop-Tops reached #1 and Daydé #6. In Spain Daydé's English version of "Mamy Blue" reached #2 while the Pop-Tops reached #1 with a specially recorded version of the song in Spanish.

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