Jennifer Lopez -- I'm Officially Jennifer Lopez Again

Jennifer Lopez hasn't been Jennifer Lopez for a long time, but she's Jennifer Lopez again. We'll explain.

It turns out ... JLo legally changed her name to Jennifer Muñiz when she married Marc Anthony (his real name is Marco Muñiz) and she never changed it back. The couple filed for divorce in April 2012, but it didn't become official until June 2014.

And JLo remained Muñiz until December 31, when court docs show her name legally reverted back to Jennifer Lopez.