JENNIFER Lopez showed off her incredible abs in a sports bra and tight leggings after reuniting with her ex Ben Affleck following Alex Rodriguez’s split.

Jennifer, 51, took a walk towards the gym while out in Miami.

Jennifer was headed out for the gym Credit: Mega

Jennifer wore a red sports bra and matching leggings Credit: Mega
The singer and actress wore a sports bra and leggings that matched the color red.

Even Jennifer’s water bottle shared the same red color as her gym ensemble.

Jennifer was spotted in Miami Credit: Mega

Jennifer carried a water bottle and her cell phone in her hands Credit: Mega
With her hair tied in the back, the movie star wore sunglasses when she flashed a smile for the cameras.

The Out of Sight actress recently enjoyed a week-long getaway in Montana recently with her old flame, Ben Affleck, 48.

Jennifer and Ben started dating back in 2002 after meeting on the set of their romantic comedy, Gigli.

Jennifer went on a romantic getaway with Ben in Montana Credit: Mega

Jennifer called it quits with Alex back in April Credit: Mega
After getting engaged, the two postponed their wedding in September 2003, just three days before they about to walk down the aisle, and split about four months later.

Ben took the Hustlers actress to his compound in the exclusive community of Yellowstone Club.

Jennifer has been getting into shape at the gym Credit: Mega

Jennifer smiled for the camera during her stroll Credit: Mega
The Sun exclusively revealed the details of the massive and private $10 million love nest.

Inside the gated community, the sprawling 32,234 square-foot home has seven bedrooms, eight bathrooms, a finished basement, and three fireplaces.

There is also a massive five-car garage and two enormous open porches for guests to see the stunning mountain views.

Jennifer reunited with Ben after her split with Alex Credit: Mega

Jennifer met Ben on the set of Gigli before the two started dating Credit: Mega
The home is near other celebrity couples, who are also Yellowstone Club members, including Tom Brady, 43, and Gisele Bundchen, 40, and Justin Timberlake, 40, and Jessica Biel, 39.

Ben bought the home back in 2013 when he was previously married to Jennifer Garner, 49.

Ben previously dated Jennifer back in 2002 Credit: Rex
The former couple reunited in May after the Jenny from the Block singer broke off her engagement to the baseball star, Alex Rodriguez, 45, in April.

However, A-Rod continues to hold out on the hope that he will be able to rekindle his love with JLo.

Jennifer and Been pictured together at an event Credit: Getty
The sports star has reportedly been in a “world of pain.”

An insider told US Weekly: “Alex is still very sore and in a world of pain.

“It’s the first time anyone can remember him being dumped like this, at least publicly.

“Seeing her running straight back to Ben’s arms is a real kick in the teeth.”

Alex has reportedly been ‘in a world of pain’ Credit: Getty

The source added: “There’s a part of him that still clings onto the hope that they’ll wind up together again but deep down he’s had to accept the harsh truth that she’s over him and moving on with Ben.

“It’s a tough pill to swallow but that’s his new reality.”

Jennifer and Alex Rodriguez ended their engagement last month, following cheating allegations with Southern Charm’s Madison LeCroy, 30.

Alex ‘clings to hope’ about getting back with Jennifer Credit: Getty