Mariah Carey is an American R&B/pop singer-songwriter, record producer and actress, well-known for her five-octave vocal range, frequent use of the whistle register, and record-breaking total of 18 number-one singles. She is frequently praised for her abilities as a vocalist, lyricist and composer, and is well-known for her number-one singles "Vision of Love", "Hero", "Fantasy", "Always Be My Baby", "One Sweet Day" and "We Belong Together". She is also known for her appearances in films such as Glitter and Precious.