In New York City, at the United Jukebox and Recording Co., band leader Benny Jackson is holding an audition for a variety show. After an awful performance by a sultry Southern singer named Phoebe Forbes, Leslie Fralick, the head of the jukebox company, has Judy Alvin sing. Judy sings beautifully, but because of a distraction at the studio, the theatrical producers do not hear her. Later, Judy discusses her lack of success in finding a job with Marge O'Day, her fellow boarder at the theatrical boarding house. While waiting for her big break, Judy gets a job as a jukebox operator, playing records for jukeboxes all over the city. Judy befriends Joe Sweeney, an employee of the jukebox company, and he takes her to the studio to make a record of her singing voice. At the studio, a recording of Phoebe's voice is made on the same record used to record Judy's song, and a mix-up ensues when Fralick plays Judy's song and believes that it is Phoebe who is singing. Fralick is so impressed with the song that he promises to make Phoebe a big star. Sometime later, Judy and Marge meet a man who introduces himself only as "Benny," and, unaware that he is Benny Jackson, they brag about Judy's association with the famous band leader. Later, Judy and Marge see Jackson's picture in the newspaper and realize that they have been duped. Benny's true identity is eventually made known, but Judy forgives him. While on an outing with her pals, Marge hears Phoebe's song on the radio and suspects that it is not Phoebe's voice. While Marge vows to get to the truth, Benny and his pal Bobo hear the song and race back to the studio to find out who the singer is. When Phoebe makes a second recording, Fralick finally realizes that she cannot sing, and accuses her of misrepresenting herself. Fralick pays Phoebe to break their contract, and then searches for the real singer on the hit record. Phoebe eventually confesses that she did not sing the song that made her famous, and Judy is revealed as the true singer. While attempting to perform Judy's song with Benny at the Tropics, Phoebe is forced off the stage and is replaced by Judy, who sings her way into Benny's arms.