IF THE SHOE FITS: “Turn to me and laugh,” Karl Lagerfeld can be heard saying as his camera records model Lara Stone trying on clothes in a five-minute movie that just went live on chanel.com. In “Fitting Room Follies,” also featuring model Baptiste Giacobini, Lagerfeld employs a freewheeling filmmaking style common in French cinema in the Fifties: with abrupt cuts, continuous takes and the director’s presence felt throughout — verbal instructions included. “You can move, you can do whatever you like,” the designer calls out to Stone in his rapid-fire parlance, as she tries on tweed suits, two-tone shoes and costume jewelry from Chanel’s pre-fall collection. After fiddling with a pearl necklace, jazz humming in the background, Lagerfeld intones: “And now you remove it, and let it fall to the floor.”