Emma Stone took the stage at CinemaCon in Las Vegas yesterday, wearing a fun, polka-dot Lanvin dress and platform pumps. The new Glamour cover girl was on hand to help hype her upcoming film, The Help, along with her castmates Bryce Dallas Howard, Viola Davis, and Octavia Spencer. Emma was busy shooting the film adaptation of the best-selling book in LA just last month. The actress headed into the project soon after wrapping up work on yet another highly anticipated movie, The Amazing Spider-Man, and making a quick trip to Fall Fashion Week in Paris. Fans will have to wait until 2012 to see Emma play Gwen Stacey to Andrew Garfield's Spidey, but she'll be a familiar face in theaters this Summer when The Help and her Friends With Benefits, which costars Mila Kunis and Justin Timberlake, both hit the big screen.