Singing music at sight is a complex skill, requiring the singer to perform pitch and rhythm simultaneously. Previous research has identified difficulty levels for pitch and rhythm skills individually but not in combination. In this study, the author sought to determine the relationship between pitch and rhythm tasks occurring concurrently. High school singers (N = 252) sang melodies with varying combinations of pitch and rhythm difficulty. Results indicate that pitch and rhythm skills retained their relative difficulty levels, regardless of the presence of other factors. Rhythmic success was significantly related to pitch success. Rhythm accuracy without pitch success occurred least frequently. Pitch accuracy without rhythm success occurred most frequently.