A Social Experiment

I read an article the other day (because I'm kinda a nerd) about how prettier people tend to be treated better and have a better likelihood of getting a better job. (I would cite it, but I can't find it...) So this got me curious. If people subconsciously treat prettier people better than less attractive people, how could this affect me? I'm a waitress at a Pizza Hut, not exactly fine dining, but if human nature is the same everywhere then this principle will still apply. What if I was to look prettier? Would I make better tips? Would people subconsciously (or even consciously) like me more if I look better?
So I'm embarking on a social experiment, beginning today I will on alternating days go to work  "all-natural" (no makeup, and a pony-tail (this is my usual just btw)) and then "made-up" (gonna have to go buy some today, meh.). I will then calculate the percentage of tips that I get at the end of every night and maybe even make a chart for you at the end of my experiment which I may just do all summer in order to get good data.
For the research methods junkies out there, I will be using percentage of tips, not amount of tips to account for days that are just plain slow. And I will make sure to calculate and make sure that the hours I work in one state is equal to the hours worked in the other. And that's all I've thought through at this point sooooo if I'm messing something up, please tell me soon as I'm beginning the experiment today =)
I'm thinking I'm not gonna like the outcome of this experiment, but we shall see, perhaps humanity will surprise me. I hope so.
Stay tuned for the results/updates!