And there was an appearance from her sparkly water cup.

Basking in the Miami sun and the possibility of new (old?) romance, Jennifer Lopez hit the gym wearing a white crop top and bold purple leggings. Not surprising after a weekend of making headlines thanks to a reunion with Ben Affleck, Lopez was all smiles, wearing her hair in a messy (for her) clipped up-do and pairing her athleisure with big, oversize sunglasses and white sneakers. She finished her gym 'fit with a go-to reusable water cup. This time, she opted for a more subtle design, eschewing rhinestone swirls for an all-black design that featured "J LO" in silver crystals and the Guess? logo.

Jennifer Lopez
Credit: MEGA/GC Images

Lopez's crop top and Affleck were photographed at Alex Rodiguez's Miami Gym after spending the weekend together — Affleck coordinated in a purple shirt for the sweat session. According to E!, Bennifer 2.0 reunited thanks to a red-eye flight and enjoyed the fresh Florida air.

"Ben took a red eye to Miami and went straight to J.Lo's new house in the early morning hours. She looked very happy to see him and they walked around the property together so she could show him around," a source said. "She had a big smile on her face and was twirling in a loose summer dress. They spent the day inside together but came out a few times for fresh air and to admire the water view."