Is You Is or Is You Ain't My Baby?

Writer: 
Billy Austin/Louis Jordan
Year: 
1943
Voices: 
Women's four part
Ranges: 

Tenor: F#4 - F#5
Lead: G#3 - C#5
Bari: G#3 - D5
Bass: E3 - G#4

This song from Five Guys Named Moe starts off with a slow and sultry verse that sets up the problem, before powering into a higher tempo for the chorus to get on with solving it.

Here is Fascinating Rhythm giving its contest premiere in 2016: