Last night, Alexa Chung attended the YSL Belle D'Opium fragrance party in New York City. The British star stuck to her signature tomboy style in shorts, a casual tee and slouchy cardigan. However, it's the fabric of her shorts which caught my eye – leather. Obviously, Alexa isn't the first to work this trend, but the high waist and zip detail definitely make them the focus of her ensemble. She has also customised her Mulberry Roxanne bag with a skeleton keyring and a long fabric strap. Do you love or hate Alexa's ensemble?