Anyone have any cool celebrity sightings in Disney?

The closest my family got was the year Michael Phelps broke the Olympic record (can't remember what year that was?). We didn't actually see him, but a week after we left he was spotted walking across the Wilderness Lodge lobby. We had stayed there the week before; we just missed him!

Lame, I know. That's as close as I've been. Which celebrities did you see? Did you talk to them?