She is best known for Tony-nominated performance in the hit Broadway musical Swing! and for writing and singing the theme song to the hit TV series The Nanny. Callaway is a Platinum Award winning writer whose songs are featured on six of Barbra Streisand's recent CD's. The only composer to have collaborated with Cole Porter, she has also written songs with Carole King, Rolf Lovland and Barbara Carroll to name a few.