Jennifer Lopez wears the names of her 12-year-old twins on the back of her black leggings in Miami

Jennifer Lopez looked fitter than ever as she flaunted her six-pack abs in a cropped olive green sweatshirt on her way into the Somi Fitness gym in Miami, Florida on Tuesday. 

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Jennifer Lopez wears the names of her 12-year-old twins on the

Jennifer Lopez flaunts her curves in a cropped sweatshirt and

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jennifer lopez looks fab in all-black hoodie and leggings as she

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Jennifer Lopez wears the names of her 12-year-old twins on the

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Jennifer Lopez, 51, shows off her pert bottom as she heads to a Miami gym