What should this birthday party invitation say?

I’m turning 15 and I’m having a girls day/night out along with a sleepover. For my birthday invitations I’m doing a Prezi (For those of you who don’t know, Prezi is a website that allows you to make extremely cool slideshow/power point presentation things). To keep it more interesting I want to have more than 2 slides, which is all it usually would take since typical invitations are sent using only 1 Piece of paper. So, here’s the thing—I need help trying to decide what to say on the “main” part. You know, the parts that say “Come and join us for some fun because so & so is turning whatever.” Also, what should I put on the other slides. Please, nothing tacky or embarrassing. I’m not turning 9 and my mother isn’t making the invitations, so I need these invites to blow people’s minds! Oh, and please keep in mind that it is a girls night out and sleepover, so please give me an answer along the lines of that. Thank you so much to anyone who can help.