Some celebrities experiment with bizarre methods to maintain a certain standard of beauty in Hollywood but Emma Stone goes down a much more affordable route. The 24-year-old revealed to French Elle magazine that the secret to her flawless complexion is baking soda. The Amazing Spiderman star said that she uses the cheap run-of-the-mill baking soda to exfoliate her skin. She also told the magazine that she is a fan of coconut hair masks.Emma has been a model for Revlon makeup since 2011.