She has appeared in several productions at The Muny Repertory in St. Louis, Missouri. She played Eliza Doolittle in "My Fair Lady" in 2001 opposite Westenberg. She also played Marian in "The Music Man" in 2004 and Guinevere in "Camelot" in 2002. Of this performance, the "Riverfront Times" reviewer wrote: "Crosby can sing a lesser-known song such as "Before I Gaze at You Again" and make us wonder why we've overlooked it all these years. She can sing a popular tune like "I Loved You Once in Silence" and make us realize that Frederick Loewe's score is possessed of a haunting quality reminiscent of Schubert."