Hit "Fifty Shades of Grey" retains top spot at US box office

ReutersHit "Fifty Shades of Grey" retains top spot at US box officeReuters(Reuters) - The hit film "Fifty Shades of Grey", an adaptation of the best-selling novel about a kinky relationship between a businessman and a college student, raked in another $23.2 million in ticket sales to lead U.S. and Canadian box office charts ...