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J Lo Performs at Global Citizen Live Concert ... And Ben's Watchin' Me!!!

Jennifer Lopez and Ben Affleck were all about the Global Citizen Live concert in NYC ... and she jumped on stage with a performance that definitely did not disappoint.

The concert was part of a worldwide event, staged in London, Paris, Rio, Lagos, Nigeria and the Big Apple ... all to put a spotlight on the hunger epidemic, the climate crisis and COVID vaccines.

Billie Eilish, Coldplay, Lizzo and Paul Simon all performed in New York, but J Lo got the most buzz as she took the stage with LL Cool J and Ja Rule for "All I have" and "I'm Real." She also sang "If You Had My Love" and "Love Don't Cost a Thing."

Global Citizen

She also wore a gold-colored Yankees hat ... interesting given her breakup with A-Rod.

The concert ran 7 hours and was a big hit ... a lot better than the rained-out Central Park concert this past summer, for sure. The skies were kinder on Saturday night.

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