The crossword solution for the term 'Pop Star Lady' is GAGA, which is a 4-letter word. Lady GAGA is an American singer, songwriter, and actress who has achieved international fame and success. She has released six studio albums and won numerous awards, including nine Grammy Awards. Her music is known for its dance-pop and electronic sound, as well as its provocative lyrics and visuals. She is one of the best-selling music artists of all time, having sold over 150 million records worldwide.