Topshop is taking audience interaction to a new level this London Fashion Week by makings its Spring 2013 show entirely customisable for shoppers. When you watch the Topshop Unique SS13 show live at 3pm on Sunday Sept. 16 on on Topshop.com, you will be able to customise what you see on the catwalk to view different colour options, shop selected pieces and makup, share looks you love on Facebook, and download the show playlist. Topshop's chief marketing officer, Justin Cooke said: "This show is all about the customer and creating what we call 'social entertainment' around our product. It's social, it's commerce and it's entertainment all rolled into one." What do you make of this fashion first?