My 18th b day is in a few days i need help decoratingggg?

what are some cute and pink easy cheap things to do in my hall my mother and father is makin me this bigg party and told me to decorate it . well im a really girly girl so i want alot of pink and purples and girly things what are some good ideas im not a very marth stuart kinda girl im not creative so i have no clue what to do ? thanks for your help