Oprah Winfrey - she would be a fascinating person to meet and I also think that she would be an easy person to have a conversation with.
Stephen King - I have a first edition of The Stand that I need for him to sign

Plus, I would be interested in meeting the mind that came up with stories like Salem's Lot, The Shining, etc.
Taylor Swift - I've been watching Taylor perform since she was a teenager. It is truly amazing to see what a powerful force she has become in the music industry. She has a rare combination of talents that have taken her far. I would be really disappointed if she behaved like a jerk towards me because I do have a high opinion of her as a person.
Bruce Springsteen - I've always loved his music and the songs that he writes and I'll never forget standing in long lines to get tickets to his Born in the USA concert. I think he would be an interesting person to talk to even though I don't agree with him politically.