Rebecca Luker was an American actress, singer, and recording artist, noted for her "crystal clear operatic soprano" and for maintaining long runs in Broadway musicals over the course of her three-decade-long career. The New York Times compared her to actresses such as Barbara Cook and Julie Andrews.

Barbara Cook was an American actress and singer who first came to prominence in the 1950s as the lead in the original Broadway musicals Plain and Fancy (1955), Candide (1956) and The Music Man (1957) among others, winning a Tony Award for the last. She continued performing mostly in theatre until the mid-1970s, when she began a second career as a cabaret and concert singer. She also made numerous recordings.