doubleofive said:
If I was younger and had wealth and influence, I would put MYSELF in these shows, not my father's over-exposed franchise.

I would not be surprised if that was also part of the deal. Glee gets to use Chewbacca but Glee has to give Katie a grand tour and meet-and-greet with the actors. (And maybe even let her be an extra in the episode.)

I've heard similar arrangements were made with the infamous N'SYNC incident and also George's appearance The OC. Both times he whored out Star Wars to please his kids.