The 45-year-old singer and "American Idol" judge petitioned to remove her married surname, Muniz, from her legal name in June of 2014 after her divorce with Marc Anthony was finalized, and according to TMZ the change became official on Jan 1.
Lopez legally changed her name to Jennifer Muniz after marrying Anthony (real name Maco Muniz) in 2004. The former couple filed for divorce in 2012.
Lopez and Anthony are parents to 6-year-old twins Emme and Maximilian.
Anthony tied the knot with Venezuelan model Shannon de Lima in November, making the nuptials his third marriage.
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