Not one.
Actually I very well may have met a few but I'm not well versed in celebrities, but I was walked around sagopanack many shabbosim, so I'm sure I walked passed famous people.
And even if I knew them its not like I could have said "omg your so and so!", it's a very big no no there.
Was really looking out for Fallon, being that I was near his house a few times, but I didn't see him.