Ok, before I run off.
At any point in the day, Disneyland has the right to refuse park entry to anyone, if you're an AP, if you're a ticket holder, or a movie star.
If you're given entry into Disneyland, you're being "invited" as a guest of the park. I would also like to point out that on the 17th, Guests of all were invited. Of the 6 thousand invited, 28 thousand showed up. Though the original 6 thousand weren't all members of the press, and movies stars, they also included church youth groups, schools, and locales.