"Maman a tort" is a 1984 song recorded by French artist Mylène Farmer. It was the debut single from Farmer's first studio album Cendres de Lune, and marked the beginning of her collaboration with her long-time composer, Laurent Boutonnat. With lyrics by , who also helped compose the song with Boutonnat, the song was first released in March 1984. Initially, Boutonnat and Dahan held auditions to find a performer for the song, which ultimately led to Farmer being chosen. An English-language version, titled "My Mum Is Wrong" and produced by F. R. David, was released in September 1984.