In 2020, the Acadian musical trio Les Hay Babies launched their third album, Boîte aux lettres, a project born of the discovery of a collection of personal letters dated 1965 and signed by a mysterious Jackie. Through the manipulation of these objects of memory, the Hay Babies’ project leads to a singular and intimate depiction of the story of this Acadian woman from Moncton who moved to Montreal to make a life for herself. In this paper, I examine the performative dimension of the archive as an object through the prism of the concept of reenactment, a reflection supported by the media interventions of the Hay Babies as well as critics and journalists in the music press. Using the song “Les vieilles filles” as a case study, I then observe how the historical representations generated by the group’s performance practices give rise to a reflexive and intersubjective process through which the latter come to narrate themselves.