The crossword solution for the term 'LADY ___ (POP DIVA)' is GAGA, which is a four-letter word. Lady GAGA is an American singer, songwriter, and actress who has become one of the most successful and influential pop divas in the world. She has released five studio albums and won numerous awards, including nine Grammy Awards. Her music is known for its catchy hooks and danceable beats, and she has become an icon for her outrageous fashion choices.