Rebecca Sullivan is a Chicago-based jazz vocalist who performs extensively in Chicago and the surrounding suburbs. She has appeared at the Jazz Showcase, Katerinas, the Drake Hotel, and the Crimson Lounge at the Hotel Sax, among many other venues.

Rebecca grew up in a musical household, learning to sing harmonies at a young age from her mother, who toured and recorded with her family's gospel a capella group. Rebecca went on to sing in choral groups and musicals, she studied and won competitions in classical piano, and she eventually taught herself guitar and began singing folk songs in coffeehouses in her hometown of York, PA, and in Portland, OR, in college. Later, while studying abroad in St. Petersburg, Russia, she had the opportunity to attend a number of jazz performances and was inspired by the vocalists she heard. She began studying jazz and was soon performing in her college's music showcases.
Rebecca later moved to Chicago and continued her jazz studies with vocalist Spider Saloff at the Bloom School of Jazz and vocalist Bobbi Wilsyn at Columbia College. She has very quickly established herself as an active performer at Chicago venues and private events. Her core repertoire includes standards from the Great American Songbook, and some of her main musical influences are Anita O'Day, Dinah Washington, Billie Holiday, Blossom Dearie, Sheila Jordan, Chet Baker, Nancy Wilson, Betty Carter, and Carmen McRae, among many others.