"Oui mais... non" is a 2010 song by French pop musician Mylène Farmer. It is the leading single to her eighth studio album Bleu Noir, released in December 2010. The single was released to radio stations on 29 September, then available for pre-order on 11 October in the digital music market, and on 29 November in CD single. The lyrics were written by Farmer and the music composed by RedOne. Unlike all of her previous tracks, Laurent Boutonnat was not involved in the song's production or composition.

Mylène Jeanne Gautier, known professionally as Mylène Farmer, is a French singer and songwriter. Having sold more than 30 million records worldwide, she is among the most successful recording artists of all time in France, where she holds the record for the most number one hit singles, with twenty-one – eight of which were consecutive.