JENNIFER LOPEZ, MARC ANTHONY- TOGETHER IN PUERTO RICO

Jennifer Lopez and her estranged husband Marc Anthony met up last week in Puerto Rico -- sparking unconfirmed reports that they hooked up.

While Lopez has reportedly been enjoying a "fling” with a 24-year-old backup dancer, Us Weekly claims that Lopez and Anthony spent the night together in San Juan while shooting their talent competition show, "¡Q'Viva! The Chosen."

Anthony picked up Lopez at the airport, and, sources say, he and JLo hooked up. "He has this hold over [Lopez],” a source claimed. "Marc never stayed in his hotel room."