What accesories should I do for my Hershey's chocolate bar costume?

So this year I'm am going to be a Hershey's chocolate bar. Yes, It is going to be a big rectangular box. I'm not sure how to make it look girly glam! Most of my cousins are doing face paint or make-up. If I do that how and what should I do?? I don't know if I should wear my hair with some barrettes or something. I just want to look girly in a sense of way. As many as ideas as possible please! Thanks, ~Gabi~