Choose a celebrity Twitter page from Celebrity Tweet to examine. Repost several of the celebrity's "tweets" (posts) here and explain what you've observed that this celebrity primarily uses their Twitter for, if you think there's a purpose, and what you think both the celebrity him/herself and his/her readers take away from the experience - if anything.
So tell me who the Twitter-er is (with their url). Copy and paste several of their tweets that you think are representative of the kind of stuff they post. Then analyze!