"Sans contrefaçon" ("Without Forgery/Counterfeit") is a 1987 song recorded by French artist Mylène Farmer. It was released on 16 October 1987 as the first single from her second studio album, Ainsi soit je.... It was a big hit in 1987 and is one of her three best-selling singles. It became a very popular song in France over the years and has been covered by many artists. A remixed version by the DJ J.C.A.