Hey, my birthday is on te 18th too! Have a slumber party, give each other makeovers, go out to eat, watch scary movies, play truth-or-dare, go crazy, DON'T SLEEP!!!! Have dinner at a restraunt, eat popcorn with movies, have chips and dips, and JUNKFOOD!!! Watch Scary movies or chick flicks like Glitter or A Walk to Remember. Decorate with Crape-paper, ballons, WHATEVER!! Have FUN and HAPPY BIRTHDAY!!