Leather-loving Brad Pitt makes a sartorial slip in Paris

Leather trousers are having a moment. It started on the autumn/winter 2010 catwalks of Isabel Marant, Balmain and Versace, and was quickly adopted (like all important trends), by Kate Moss, then Rihanna and Victoria Beckham.- In pictures: Men in leather trousers, fashion's biggest crime?- Leather trousers trend in pictures- Shop women's leather trousersBut news that erstwhile