The trio are employed as handymen in a recording studio. While not doing their work, they hear a recording session as a woman sings "Voices of Spring." Impressed by the operatic virtuosity of this stunningly beautiful soprano, Curly lip syncs, as the other stooges dress him as a woman. Curly (in drag) is "heard" by the radio host. Moe dubs Curly "Señorita Cucaracha," and the trio are hired to sing professionally on the radio, but must also appear at the home of the radio show’s sponsor for a party. (thetvdb.com)