Does anyone know any fun activities to do at a female 17 year old bday party?

okay so my bday is on january first and tha party iz on the second. this will be my first real birthday party ive had in my life so i want it to be great. instead of just dancing for 3 hours i need to know some fun games or activities for us to do. the age range is 15-18, non alchlic and can be divied among 45 people ( my total number of guest) thankx n adv for ur help!