Sometimes, all it takes is one key piece of flair to make an outfit (and not 15, like the progenitors of the term suggested). Take this gorgeous model for example, whose outfit dazzled us even though she was wearing a simple black coat and pants. The key to her street-style-snapitude? That effervescent scarf, which—lucky for you—is one of the most inexpensive things to buy to liven up a ho-hum outfit. These two floral examples from Urban Outfitters would do nicely, and are voluminous enough for winter months, but light enough to keep wearing in the spring. And for under $30, that's a piece of flair you can't pass up!