Special Agent Oso is an adorable stuffed bear and an agent-in-training! Oso is always eager to help, even if he doesn't always get things right.

Disney Channel star Christy Carlson Romano, Disney Legends, experts and more. Watch "Disney100: A Century of Dreams - A Special Edition of 20/20" this Thursday, Dec. 14 at 9 p.m. EST on ABC.

The Smashing Pumpkins performed their unreleased Christmas song “Evergreen” and a cover of Bing Crosby’s “Silver Bells” live at Walt Disney World for Disney’s holiday special.