It's been ten years since Girls Aloud were first formed on Popstars and their style sense has changed so much. In the first few years they mainly wore jeans and vests-quite casual clothing. Now though, they look so professional and sleek and even though their outfits are still quite casual they are upkeeping with the trends. They really have grown into their own style, not just with fashion but also with their hairstyles. Here's a look at some of their most iconic and *ahem* interesting outfits.