#3 Mary Kate Olsen and Olivier Sarkozy
Celebrity twin Mary Kate Olsen (26) and Olivier Sarkozy (42), the half-brother of President Nicolas Sarkozy, started dating back in 2012. Apart from a huge 17-year old age gap, the two look really odd together. Mary Kate is so petite, unlike Olivier who’s over 6 feet tall. She certainly looks like his daughter, rather than his fiancé. And yes, they’re engaged to be married this 2014.