Summer's performance debut occurred at church when she was ten years old, replacing a vocalist who failed to appear. She attended Boston's Jeremiah E. Burke High School where she performed in school musicals and was considered popular. In 1967, just weeks before graduation, Summer left for New York City, where she joined the blues rock band Crow. After a record label passed on signing the group since it was only interested in the band's lead singer, the group agreed to dissolve.