"SuperStar Sleepover"

Two of my best friends are turning 17 this weekend, so I`m planning a surprise slumber party (we haven`t had one since we were like, 12!) for them. I decided on a SuperStar/Hollywood theme and I need help with ideas for it. You know... Decorations, food, games, etc. There are only 8 on the guest list (small compared to our typical 20+ guest lists), but I still want to make it big and memorable... Please help!!!