Stores have often relied on sending big orders to Asia, where manufacturing is cheaper, but this can take months to turn around. So now some brands are looking to move production to Europe so they can shift stock more quickly.
"Faster is absolutely better because part of the selfie phenomenon is that women want changing trends, and current trends, quicker," Miss Merriman said.
Clodagh Pickavance, 23, a publicist for beauty companies, told the Financial Times: "I have made a conscious effort to start buying more skirts and tops rather than dresses, because at least then I can mix and match them and it looks like a new outfit".
Sheena Sauvaire, global marketing director at Topshop, said: "What we are seeing now with that younger Millennial [those born between the early 1980s and early 2000s] is that she is peacocking on social media. So this girl will spend less on certain items, but she'll still desire a great jacket, or a great top."
Retailers are developing apps to allow shoppers to buy items by clicking on images of them being worn on social media, rather than from a shop or web store.
"Buy buttons" make it easier to buy from Twitter, a Pinterest post, or even an Instagram photo.
- Daily Mail