It was a picture-perfect day at Disneyland, with blue skies and bright sunshine. And of all the people streaming into the park on May 26, few seemed quite as joyful as Angelina Jolie. The mother of six was there with her brood (and some visitors from Cambodia) to celebrate the 11th birthday of Shiloh Jolie-Pitt, Angie’s oldest biological child with ex-husband Brad Pitt. As the family and friends strolled, snacked and went on ride after ride, Angie wore a serene, genuine smile — seemingly for the first time since filing for divorce on Sept. 21. “Angelina’s in a really good place at last,” an insider tells Star. “The past year was the most challenging period of her life, but she’s over the hump and is fully focused on taking care of herself and the kids.” If the day at Disney is any indication, the star has finally found her personal Happiest Place on Earth!