This is my idea for a spa sleepover. I combined ideas from the other spa parties on this site along with mine.  INVITATION: To start, make a list of everyone your daughter wants to invite.  With her, pick her closest friends- about as many as half of her age.  To make invitations, buy spray bottles that could fit an invitation inside. Type your invitation on fun paper. It should include the date, time, place, an idea of what the girls are going to do, and a part asking to bring your own brush..Also add an overnight packing list(so no one forgets their toothbrush!)and a note asking to bring their most interesting/cool/wacky clothes for the After" Fashion Show.  Finish the invitations by rolling them into the bottle and tying ribbon around the neck of the bottle.  Pick ribbon in the party's theme colors.  DECORATIONS: This party uses five rooms: kitchen dining room any room with easy to clean floors a large room and a sleeping room.  Decorate these rooms with balloons candles(in theme colors) and crepe paper. Put tablecloths and confetti on the tables in the kitchen and dining room.  In the entrance to your home have table with a plastic tablecloth. Have a sign that says (ex.)"Lia's Spa."  For the large room make sure the room doesn't have an open floor plan and has a door to enter.  Buy a red carpet from a party store and roll it out from the entrance. Hang a tablecloth in the doorway. Have a table and a few chairs.   COSTUMES:  It is a good idea to hire two or so friends to work at your daughter's "spa."  Have all workers wear the theme colors.  Provide faux flowers for the workers to put in their hair.  ACTIVITIES: When the guests begin to arrive take them to the sleeping room to put down all their things. Then take them to the craft table(aka the kitchen table)to work on a craft until the other guests arrive. Good crafts include picture frames lotion and perfume making.  After every guest has arrived take "Before" pictures. Have the girls make very mad faces. Lead the girls to the room with the cleanable floor(Before the party group enough chairs for each girl into a circle). Have each girl sit in a chair. Turn on pop music. Have magazines to read.  Give the girls yummy drinks of pink or purple vitamin water in plastic margarita glasses with a wedge of lime.  Don't use lip-staining fruit punch.  Start with facials. Push each girl's hair back with a hairband and put a towel around each girl's neck. Wash off each girls face with a mild soap and apply a mask and cucumber slices on the eyes.  Have everyone lie back and relax.  Next do makeup. Apply lipstick blush and eyeshadow in a bright color like blue.  After that do hair. Go to libbylu.com for inspiration. Finally have your helpers do the girls' nails and toenails and massage their feet.  Have them hand out dollar store flip-flops. After this have the girls eat(see below).  When they are done eating take them to the large room.  Let them change into the outfit they brought for the "After" Fashion Show.  Have them line up outside the door. Every girl walks down the carpet poses for the judges(your helpers)and the paparrazzi(you taking a picture).  Have four categories: Outfit From Home Mix and Match(pick an item from three boxes:hatscarfand jewelry) PJs and Crepe Paper Challenge.  In Crepe Paper Challenge you divide into teams to create an outfit made from crepe paper.  Give out awards after the fashion show. PARTY SNACKS: While your helpers do the girl's nails make a buffet of finger food on your counter. Start with plates and silverware and add party food like bagel pizzas mozzarella sticks and chicken fingers.  After the girls come and eat take them to the large room. For breakfasthave a breakfast buffet of breakfast food.  GAMES: After the fashion show let the girls have a pillow fight while you prepare dessert.  CAKE/ICE CREAM: While the girls have a pillow fight prepare the ice cream bar. Have bowls spoons ice cream pound cake chunks sprinklesetc.  Give out candles to stick into the sundaes. After the birthday girl blows out her candles and opens gifts send the kids to bed with favors and games.  FAVORS: For favors give out lip gloss lotion hairdo clips jewelryetc.  "