Annetta Giovanna Gassion (née Maillard; 4 August 1895 – 6 February 1945), known by stage name Line Marsa, was a French cabaret singer and circus performer, as an equestrian and tightrope artist.

She is best known as the mother of internationally renowned singer Édith Piaf, considered France's national chanteuse.

Born Annetta Giovanna Maillard on 4 August 1895 in Livorno, Tuscany, to French parents who were on tour as part of a travelling circus troupe.

Marsa was portrayed by Clotilde Courau in Olivier Dahan's 2007 Piaf biopic, La vie en rose.

The livornese graffiti artist Mart made a painting on the wall of the public park Villa Fabbricotti and a stone plate: "Line Marsa / (Anita Maillard) / nacque a Livorno / 4 agosto 1895".