The selfie phenomenon is changing women's shopping habits, according to an industry expert.
Retail analyst Jamie Merriman said the obsession with posting pictures on social media websites means many young women feel under pressure constantly to refresh their wardrobe so they are not photographed in the same outfit too often.
Therefore rather than splashing out on statement dresses, they are more likely to buy cheaper tops and skirts that they can mix and match to create new looks - or throw out and quickly replace.
Miss Merriman, of investment company Sanford Bernstein, said young women are operating a "conveyor belt" system, selling items they have worn a few times on eBay to fund new purchases.
This is putting retailers under pressure to turn out new stock based on the latest trends more regularly.