The term INSTRUMENT FOR LADY GAGA is a crossword solution for the word PIANO (5 letters). Lady Gaga is an American singer-songwriter, actress, and record producer who has been active in the music industry since 2008. She is known for her unique style of music and fashion, and often incorporates various instruments into her performances. The instrument for Lady Gaga is the PIANO, which is a musical instrument that produces sound when its keys are pressed. The PIANO is one of the most popular instruments in the world and is used in many genres of music, including pop, rock, jazz, and classical.