Christina Ricci and her new caramel colored hairdo flashed a big smile at LAX on Thursday. She's made some drastic changes to her hair in the past, but this time around Christina decided to go back to her roots — literally. She said, "I actually really like it. I read a long time ago, in some beauty bible, that if you want to change your hair color, you should go back to the color you were as a toddler. So that's what I was." We're not so sure that this hair dye theory would work on everyone, but it certainly makes Christina look baby-faced again.