Is there a battle of the french going on? Audrey Tatou for Chanel v. Marion Cotillard for Dior? Both ladies have been reunited with the directors that brought them their biggest film success. {Dahal directed Marion in La Vie En Rose.} Chanel released a “making of” video to hype up the release of the new Chanel No. 5 campaign, and now Dior is twittering clues daily and released a trailer to …. what? To a short film? The only difference in tactics is that Dior has embraced the idea of having the whole thing blogged, whereas Chanel did not.