i would buy her some pretty panties and tell her that she cannot mess them up and that if she has a "dry day" you will reward her by doing something special with her, baken cookies, going to the park, carving pumpkins, what ever is cheap and relatively easy; another thing that worked for me is i would start taking away her favorites; (the dora videos worked like a charm for me) my daughter did the very same thing yours is; she didn't want to use the potty and defied me on it so i did the panties thing and watched her deliberately stand in the living room and make a mess of herself. i kept my cool told her to pick out her favorite dora video and bring it to me; (she was geeked thinking she was gonna get to watch it after all when i told her no before) and she hands it to me and i flat out told her that instead of using the potty she messed up her panties on purpose so she was not going to watch the video at all that day and that if tomorrow she decides to have a dry day she could watch it before bedtime..(no it didn't work the first day, but i ended up with 3 of her favorite shows that she ALWAYS watched over and over again and refused to let her watch them she finally caved in on me!!)