Poppy and cara delevingne showcase sibling style at the animal ball

  Stylish siblings Cara and Poppy Delevingne showed off their sibling style at The Animal Ball charity fundraised in London last night. And while Cara is best known these days for her goofy faces and colourful street style, she managed to reign it in and go back to her socialite roots for her red carpet look. Smooth dark blonde locks and a classic black dress - it's only the headpiece and, uhm, whip which provide a hint of Cara's usually quirky style. Sister Poppy wins the sibling hair wars for me on this occasion - her beachy blonde waves are the kind of bedhead style most of us dream of achieving.