American recording artist Monica has recorded material for her eight studio albums and has collaborated with other artists for duets and featured songs on their respective albums and charity singles. She is also known to have written, recorded and filmed material that has never been officially released. Many of the singer's unreleased songs have been registered – the majority by her publishing company Mondenise Music – with professional bodies such as the United States Copyright Office, the Songwriters Hall of Fame, Broadcast Music Incorporated (BMI), American Society of Composers, Authors and Publishers (ASCAP), and EMI Music Publishing.