Jennifer Lopez, Alex Rodriguez Separate: Reports

MIAMI -- Singer Jennifer Lopez and former New York Yankees baseball star Alex Rodriguez have called off their engagement, U.S. media reported on Friday.

Lopez, 51, and Rodriguez, 45, had been a couple for nearly four years and had just last year bought a $40 million home in Miami. 

The pair have not confirmed the break up reported by the New York Post's Page Six and TMZ.

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Lopez was in the Dominican Republic filming a movie and posted Thursday on social media saying "Find a good reason to laugh today."

Rodriguez, for his part, posted a picture of himself aboard a boat in Florida.

While the news caught many fans by surprise, the split had apparently been in the works for a while.

"This has been a long time coming," a source told People magazine. 

"They are tied in their business worlds so it's not a cut and dry break up. It's taken a while for them to even think about untangling it all."