Exactly who is Paris Hilton dating this week? It appears that it’s wealthy ex-boyfriend Stavros Niarchos, at least judging by reports that she was all over him. Apparently she freaked out that some other girl (reputedly Caronline Vreeland) was paying attention to him, yelling at him, dancing in front of him, then finally resorting to punching the girl. A Hilton rep of course denies this. Now wasn’t Paris dating someone else last week?