Mary-Kate Olsen was back in NYC yesterday, but she may have left her heart back in Paris. While she was in the city of love for Fashion Week, she supposedly found herself a new man — Lapo Elkann, Italian Lothario and billionaire heir to the Fiat fortune. Remember him sitting right next to MK for some of the shows (looking a little loony town, sorry). When you put it that way it sounds fine, but Lapo has made a name for himself by his hard partying ways including an infamous 2005 overdose on cocaine and heroin. He's apparently clean now and an excellent businessman, so maybe he's good? Well, hopefully.