I agree with chas' comments about the various versions, but just to clarify, after doing some research I found that the SUNY -State University of NY in Purcase NY) Soul Voices is (or at least was in 2011 when this was recorded) an elite and diverse group of vocalist in the school ....
So, chas, while some of them MIGHT be 'soccer moms' now, I don't know if any of them were then ...
And the second vocal version was obviously more about the conductor than the group ...