PARIS — Short skirts have been one of the biggest trends in Europe. So it isn’t surprising that they played a leading role in the beautiful Chanel collection Karl Lagerfeld showed on Tuesday. Lagerfeld likes them, naturally, with all kinds of jackets, laced with everything from little strands of thread to crystal-encrusted braiding. Here, his sheer beaded jacket, top and micro-mini. For more on the shows, see pages 6 to 10.