It’s not Star Wars, but if the Magic Kingdom is doing them when you visit, consider signing up for a Keys to the Kingdom tour. I think you have to be 16 to take the tour, so that would make it special for her Sweet Sixteen visit. It costs about $100/each and lasts around five to six hours. It includes lunch, probably at Pecos Bill’s, and escorted rides on two attractions, probably Jungle Cruise and Haunted Mansion. You also get a souvenir keepsake. The tour goes behind the scenes for a look at things like parade rehearsals and float preparations. The best thing, though, is that you get to visit the park’s underground tunnel system which is pretty impressive. I imagine you can make reservations online, but I’m sure you make them by phone.
Also, don’t forget the little things:
I think you can still get a special Mickey-ears birthday cake at any table-service if your pre-order and attach it to your ADR. We got one several years ago, and it was enough for six of us. It was surprisingly inexpensive; I think back then it only cost around $25. Even if you don’t purchase a birthday cake, let the server know it’s your daughter’s birthday, and they should bring her a cupcake or other treat with a candle in it.
When you check-in (if not before), be sure to let your resort know that it’s her birthday; it doesn’t always happen, but sometimes they'll deliver birthday balloons to your room. When you tell them, also ask them to arrange for a character birthday call to your room. Perhaps, they may now make calls to cell phones as well.
You can contact the WDW florist (I think it’s called something like Disney Florals and Gifts) ahead of your arrival. I bet they can create a Sweet 16 flower arrangement to be waiting in your room when you arrive.
Also, don’t forget to have her pick up a birthday button at a main guest services office near the front of any park. If nothing else, she’ll get lots of birthday greetings as she travels throughout WDW. I'm pretty sure that they sell birthday ears in the parks too. Ask the CMs at guest services where you can buy them, or maybe you can pick up a set in advance somewhere online.