Disney World tends to keep any celebrity visits as quiet as possible. With the exceptions of Soap Opera Weekend and the special concerts of course.
We happened to encounter one celebrity and were thrilled but took notice that not one single guest or Cast Member treated him like he was any different from anyone else. We asked our server (we were at a restaurant) and she said "they all want to be treated just like everyone else". We were in the same with him for about 45 minutes and no one approached him for an autograph. He didn't have an entourage (and he should have). It was him, his wife, his son and one band member. They were just regular folk like everyone else. Very refreshing.