Karaoke? If you don't have one, you could borrow or rent one. Videotape the girls' performances.
Manicures/or Pedicures? Give to each other, take a trip to the local salon or you and another mom give them to the girls.
"Make-overs" Curling & Straightening Irons, lots of make-up. Then take snapshots or 'modeling' photos.
Let them make pizza--buy dough from local pizza shop or make individual bobolis. Maybe even a fruit or dessert pizza.
Hire a dance (or Zumba!) teacher to teach the latest dance moves.
Girl's Life and other magazines or books have little quizzes that the girls like to do. (Would you rather eat slimy inchworms or slug?, What type of Animal Are You Most Like?...you get the idea). Have the quizzes prepared in advance.
Hope these help.