Fitness fiend: Jennifer Lopez looked stunning makeup free as she headed to the gym on Sunday for the second day in a row

J Lo had her hair tied back in a messy top knot as she went sans make-up to workout.

Over her flawless skin, the popstar wore an oversized pair of sunglasses with ombre tinted lenses.

Jenny from the block opted for a black cropped Champion pullover sweatshirt that she layered over a grey top.

The actress paired the look with black performance leggings with a grey pattern and some Nike Presto sneakers.

So chic: The beauty rocked skin tight spandex leggings and a cropped black sweatshirt that she layered over a grey top

Just a day before, the beauty was spotted in a different black spandex ensemble as she headed to break a sweat.

The star frequently works out with beau Alex Rodriquez and often proudly shows off her strength on social media.

And, all that hard work pays off for the mogul.

‘I’ve taken care of myself, and now it shows:’ Jennifer Lopez told InStyle in an interview last month

Last month the Bronx native appeared half naked on the cover of InStyle and opened up about how she looks so age defying.

To star with, she has three major health pillars that she holds fast to: no caffeine, no alcohol and lots of sleep.

‘I’ve taken care of myself, and now it shows,’ she told the magazine.

‘In my family, curves were glorified and part of the culture. It was just like, “Jennifer has a big butt, and it’s good,”‘ she said.

Second act! Jennifer recently released Limitless, the original song for her upcoming flick with Vanessa Hudgens and Leah Remini, Second Act

Up next, Jennifer will take the lead as Maya in the much-anticipated romantic comedy, Second Act.

The beauty will star alongside best friend Leah Remini, Vanessa Hudgens and Milo Ventimiglia.

She just debuted her latest song, Limitless for the upcoming film.