Question: About which singer is the film in which Sylvie Testud  appeared in 2007 ?
Context: La France is a French film directed by Serge Bozon, released in 2007.  It stars Sylvie Testud and Pascal Greggory.  The film won the Prix Jean Vigo in 2007. French Women (original title: Sous les jupes des filles) is a 2014 French comedy drama film and the directorial debut of Audrey Dana.  The film tells the stories of eleven women in Paris and features an ensemble cast including Isabelle Adjani, Alice Belaïdi, Laetitia Casta, Audrey Dana, Julie Ferrier, Audrey Fleurot, Marina Hands, Géraldine Nakache, Vanessa Paradis, Alice Taglioni and Sylvie Testud.  The French title directly translated is ""Under the Skirts of Girls"". Fear and Trembling (original title: Stupeur et Tremblements) is a 2003 French film based on the novel of the same name by Amélie Nothomb.  The film was written and directed by Alain Corneau and stars Sylvie Testud. The Round Up (French: La Rafle ) is a 2010 French film directed by Roselyne Bosch and produced by Alain Goldman.  The film stars Mélanie Laurent, Jean Reno, Sylvie Testud and Gad Elmaleh.  Based on the true story of a young Jewish boy, the film depicts the Vel' d'Hiv Roundup ("Rafle du Vel' d'Hiv"), the mass arrest of Jews by French police who were accomplices of Nazi Germans in Paris in July 1942. Lourdes is a 2009 film directed by Jessica Hausner.  It stars Sylvie Testud, Léa Seydoux, Bruno Todeschini and Elina Löwensohn.  It received the 2009 Vienna International Film Festival's Vienna Film Prize for Best Film. Final Portrait is a 2017 British-American drama film written and directed by Stanley Tucci.  The film stars Geoffrey Rush, Armie Hammer, Clémence Poésy, Tony Shalhoub, James Faulkner and Sylvie Testud. Sagan is a 2008 French biographical film, directed by Diane Kurys, starring Sylvie Testud as French author Françoise Sagan and Pierre Palmade as a dancer and a society man, Jacques Chazot, who was very well known in France.  The film starts in the mid-1950s as Sagan (then still known under her real name Quoirez) closes a publishing deal for her controversial debut novel "Bonjour Tristesse". Vengeance () is a 2009 Hong KongFrench thriller film directed by Johnnie To, and written by Wai Ka-Fai.  It stars Johnny Hallyday, Anthony Wong, Lam Ka-Tung, Lam Suet, Simon Yam and Sylvie Testud.  The film tells the story of Francis Costello, a French chef and former assassin whose daughter, son-in-law and grandchildren are attacked by a gang of Triads.  Costello travels to Macau to embark on a quest for revenge, enlisting the aid of three hitmen.  The film explores the themes of assassination, violence and the influence of Triads in modern society.  Produced by Milkyway Image, the film was released by ARP Sélection in France, and Media Asia Films in Hong Kong. Sylvie Testud (born 17 January 1971) is a French actress, writer and film director, whose film career began in 1991.  She won the César Award for Most Promising Actress for "Murderous Maids" (2000), the César Award for Best Actress for "Fear and Trembling" (2003) and the European Film Award for Best Actress for "Lourdes" (2009).  Her other film roles include "Beyond Silence" (1996), "La Vie en Rose" (2007) and "French Women" (2014). La Vie en Rose (] ; French: La Môme ) is a 2007 French biographical musical film about the life of French singer Édith Piaf.  The film was co-written and directed by Olivier Dahan, and starred Marion Cotillard as Piaf.  The U.S. and U.K. title "La Vie en Rose" comes from Piaf's signature song.
Answer: Édith Piaf.