The time has come to choose 2012's red-carpet queen! Presenting five very deserving nominees: Emma Stone, Diane Kruger, Gwyneth Paltrow, Kate Middleton, and Kristen Stewart. While they all look great in casual jeans and flats, there's something truly showstopping about when they slip into a gown and high heels. Who can forget Gwyneth's ultrachic Oscars moment in white Tom Ford? We also witnessed Kristen Stewart come out of her shell, embracing her role as a total Hollywood — and red-carpet – star in gowns like this fiery Reem Acra. Meanwhile, Emma Stone proved her fashion-darling status while promoting The Amazing Spider-Man in high-wattage gowns from Chanel and Giambattista Valli, and Diane Kruger gave us a plethora of wow-worthy gowns on every red carpet from Cannes to Beverly Hills. Of course, we've also been captivated by the lovely Kate Middleton's red-carpet turns in an elegant array of dresses from the likes of Jenny Packham and Temperley. Take in all five stars and their red-carpet moments, and then cast your vote below.