When Manilow was inducted into the Songwriters Hall of Fame in 2002, he made a point of attending with and crediting his co-writers, including Anderson.
Manilow had been playing piano at the Continental Baths in New York, and had befriended Bette Midler, who sang there.
Anderson's contributions were described as being closer to Manchester's sensibilities than her previous co-writer, Carole Bayer Sager.
Recent collaborations have included co-writing with noted songwriter, arranger and producer Leon Ware.
Anderson also wrote the libretto for City Kid: The Musical, which premiered at Village Theatre in Issaquah, Washington,[6] and subsequently opened in Los Angeles in 2007.