With celebrity trends often at the forefront of the minds of fashionistas, it's no wonder that an online shop dedicated to them is doing so well.As Seen on Screen - or Asos as it's called for those in the know - has doubled its sales over the past six months, widely due to women looking to emulate the style of their favourite celeb.By simply entering a search term such as Victoria Beckham or Sienna Miller, a number of style choices are conjured up, giving ladies the items their idols would choose.Garments come "in the style of" your favourite stars at a discounted price, a winning formula for anyone wanting a pair of Cheryl's trademark platforms or Kate's printed t-shirts.Asos was founded in 2000 by Nick Robertson, a budding entrepreneur from Woking in Surrey.The website has since signed up brands such as Alexander McQueen and Karen Millen.(c) 2007 Adfero Ltd.