Super model Bar Refaeli and Leonardo DiCaprio have officially called it splits after a year back together.  The Israeli model rekindled her romance with DiCaprio last year after a four-year relationship that ended in 2009, but now they have grown apart, a source tells the New York Post. The source insists no third party was involved, although Refaeli was spotted with a mystery man this week, and adds, "neither were ready to settle down, and both have busy careers that have been taking them in different directions."