Making a big splash, the 42-year-old singer and her boyfriend Casper Smart soaked up the southern sun with the adorable Max and Emme Anthony.
Jenny's 4-year-old twins seemed to be having a great time, jumping into the water making cannon balls, loading up super soaker water guns and even getting piggy back rides from the mother's 25-year-old backup dancer boy-toy.
J.Lo didn't sit back and let her kids have all the fun alone. After relaxing poolside in a sexy yellow two-piece, the "On The Floor" singer decided to cool off and jump in herself.
Although they all had a great time, J.Lo wasn't too fond of the paparazzi snapping away on her family's adventure. She tweeted:
Check out the photos above of the thrilling time Jennifer and Casper had with Emme and Max at their Miami hotel.