Now that we've gotten the ball rolling on 2012's best red-carpet queen, it's time to move on to the street-style star of the year. Here are our five equally fabulous nominees: Jessica Alba, Kate Bosworth, Olivia Palermo, Diane Kruger, and Miranda Kerr. They all have different style aesthetics, but you have to admit: they always look flawless on the sidewalks of whichever city they're in. In 2012, Jessica kept her looks trend-driven (have you seen how many colored jeans she owns?!), Kate was loyal to her cool bohemian flair, Olivia turned it up in an array of chic ensembles, Diane stuck to her effortlessly cool denim and stripes, and Miranda exuded megasophistication in chic designerwear. This isn't going to be an easy decision, but we need your help making it, so cast your vote for your favorite street-style star below.