>> Spring 2010 Ad Campaign Casts for Alexander McQueen, Christian Dior, and Chanel: Revealed — After skipping out on a traditional ad campaign last season, it sounds like Christian Dior is bringing it back for Spring 2010 — John Galliano revealed Monday that Karlie Kloss is his girl of choice for the brand.  Karl Lagerfeld, meanwhile, is continuing the trio theme from the Spring 2010 Chanel show finale for his campaign cast — menage a trois participants Freja Beha Erichsen and Baptiste Giabiconi are both staying on, with Claudia Schiffer replacing Lara Stone; Lagerfeld plans to shoot the threesome on location in Buenos Aires, marking his first time in Argentina.  And word is Nick Knight and Raquel Zimmermann, who worked together to produce the background video for Alexander McQueen's presentation, also collaborated on the designer's forthcoming campaign. [WWD, WWD, WeLoveModels]