07/14/2013 12:16 pm ET

Fergie From Black Eyed Peas - I'm Changing My ENTIRE NAME


Fergie Ferg from the Black Eyed Peas is in the middle of a serious identity crisis -- 'cause she's petitioning the court to legally change her FIRST and LAST name ... TMZ has learned.

Ferg -- born Stacy Ann Ferguson -- has filed legal papers requesting to officially change her name to Fergie Duhamel ... roughly 4-and-a-half years after marrying Josh Duhamel.

Read more on TMZ