The famous refrain:
C'est l'Doudou c'est l'mama
C'est l'poupée, poupée, poupée
C'est l'Doudou, c'est l'mama
C'est l'poupée St Georg' qui va
During the week of Doudou, you will hear this song everywhere (esp. during the Battle of the Lumeçon). People would sing it over and over again.
You can really feel the spirit of Doudou from this cheerful song. And I always happy to hear and sing it along with the crowds.