Although I have seen tons of famous people where I used to work (New York City), I have never seen one in Disney World. On our last trip, when we came back I was reading the Star and there were pictures of Janet Jackson in Disney World at the same time we were there, but I have never seen her.
I used to work on the upper west side west 66th St. right around the corner where Regis does his show and used to see him on a daily basis. Over the 15 years I worked there here are the list of people I have seen walking along on the street:
Regis on a almost daily basis. He would wave when he saw me and my dad.
The Late great John Lennon. He lived in the Dakota (about 5 blocks away) and Yoko Ono many times.
Madonna (4 separate times) once with Sean Penn. She lived down the street.
Michael J. Fox and Family (before he became ill).
Don Johnson (when Miami Vice was on). They filmed their season finale on the corner of my shop.
George Clooney (filming a movie blocks away).
Billie Jean King, I used to cut her hair. (The tennis player)
Peter Falk (he came in the shop) My father cut his hair.
Henry Wrinkler (the Fonz). Also got his hair cut by my dad.
This area was very hot for celebs, over the years, there were many more, but here are the ones that came to mind first. This was almost 20 years ago.