10. Jennifer Lopez & Alex Rodriguez

Ryan Gosling met Eva Mendes on the set of 'The Place Beyond The Pines', the crime-drama from 2012 where they each played the leading roles. Ryan's net worth of $60 million is four times that of his co-star. While it's a great idea to have an extra 15 million dollars in your bank account, while your partner is responsible for costs, the situation isn't ideal. The relationship between these two couples proves that financial differences don't necessarily lead to an unbalanced partnership.