Oh, you're so cute! Sorry. I just had to say that. Umm...USE MAC. MAC is a really good (slightly expensive, but good) makeup company that will work better than any other kind of non-hollywood makeup you can find. Look here: maccosmetics.com
Use black liquid eyeliner, light pink/peach powder blush, a little bit of eyeshadow in your preferred neutral shade, some black mascara (i use maybelline define-a-lash)
and some lip gloss!
Don't over do it...but I think if you follow my reccomendations you'll look just great :]