HELP! 13TH BDAY PARTY/SLEEPOVER!!!

I am turning 13 and i am havin a party with around 10 gurls and 4-6 boys. The problem is is that i have NO IDEA WHAT TO DO AT MY PARTY! PLZ HELP ME!!!! also i am having 6 gurls stay the night after the party SO IF U GOT ANY IDEAS FOR THAT 2 THEN THAT WOULD BE AWESOME! the party lasts for 2hrs and 30min. I already got a couple of things to do but not enough to keep us all busy and havin fun for that long! i am havin the party at my house and it cant cost that much! IF U GOT ANY IDEAS PLZZZZZZZZZZ TELL ME! thanks! :)