Madonna Louise Ciccone is an American singer, songwriter, and actress. Commonly known as the "Queen of Pop", she has been widely recognized for her continual reinvention and versatility in music production, songwriting and visual presentation. Madonna's works, which incorporate social, political, sexual, and religious themes, have generated both controversy and critical acclaim. A prominent cultural figure spanning both the 20th and 21st centuries, she remains one of the most "well-documented figures of the modern age", with a broad array of scholarly reviews, literature, and art works about her, as well as an academic mini subdiscipline devoted to her called Madonna studies