The last famous person I spoke to was Willie Nelson several years back.
My parents took my brother and I to this free outdoor concert- Willie was there, Trisha Yearwood, Dwight Yoakom, and a bunch of other people. My bro and I were by the trailers trying to see people. There was this group of women searching for Dwight and didn't notice Willie so he came over to talk to us a bit. I didn't know who he was then, it was about 8 years ago, but now I think it was kinda cool.
My favorite famous person moment- my mom was really good friends with Faith Hill growing up and my first concert ever was Faith and Tim when I was 9. People were bringing gifts up to the stage, like flowers and things. My mom brought her high school pin with her and let me give it to Faith. It took her a minute to realize what it was and when she did, she tried to bring me up on stage, but the guard wouldn't let me. We got to go backstage without passes that night. It was just sheer awesomeness!