Madonna Louise Ciccone is an American singer, songwriter, and actress. Regarded as the "
Queen of Pop", she has been 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 cultural icon spanning both the 20th and 21st centuries, the Rock and Roll Hall of Fame called her one of the most "well-documented figures of the modern age" in 2008. Various scholarly reviews, literature, and art works have been created about her along with an academic mini subdiscipline devoted to her called Madonna studies.