For my sister's birthday last year we decided to do an Ooh-La-La Spa. We had eleven girls come over for a sleepover. When everyone got there we handed out handmade wallets (made from envelopes folded in half and decorated with markers ahead of time)with Monopoly money inside. Then we had them make pizzas for later (toppings on tortilla shells). We then seperated the girls into different groups while the pizzas cooked. While we were waiting for them to finish we played hand games. When they were done we ate and then started going to the different "stores." This consited of a nail painting station (Magic Manicures) and a station for face masks (Fabulous Face). We had some of my friends help out painting each girls nails and smearing a carrot mask on their faces (this can be done with any type of face mask, we used carrot because it seemed easiest).After each girl had their face and nails done, they would pay a set price with the Monopoly money that we had given them.  When we were all done, and everyone had had a chance for both, we got into pajamas and watched Legally Blonde. All the girls had a really great time.