If you see a famous celeb in person what might be different about them when not in a movie or music video?

I live near the world famous hotel The Homestead here in Virginia (a place often frequented by celebs...Jodie Foster and Richard Gere stayed there while filming "Sommersby" for example), and one night I was working the night shift at a local convenience store when a limo from there pulled in on the way to the airport and out of it came the driver and a woman who looked very familiar to me. I swear she looked like Sandra Bullock but I couldn't be absolutely sure. I discreetly watched her as she picked up the things she wanted and when she came to the counter I said to her "I hope you don't mind me saying but did anyone ever tell you that you look like Sandra Bullock?". She smiled and turned to the driver who was still at the back of the store getting a drink and said "Did you hear what he said? He said I look like Sandra Bullock". They both just laughed (sort of in a knowing way). She said thank you and he paid for his stuff and they quickly left. She wasn't really all that "made up" and was wearing what I could tell was a wig ( it looked a lot like the one she wore in the movie 'Speed'. Being an old Virginia girl, being that close proximity to the resort, a limo going to the airport in the middle of the night, and judging by their reactions...I'm convinced to this day that I came face to face with Sandra Bullock.