https://www.youtube.com/watch?v=tCAKF6jnohoI'm posting this on the Supremes side because of the connection.
It seems that a lot of the songs that did not include Flo, Mary or Cindy were meant for someone else [[Someday comes to mind). The instrumental and backing tracks were already done and Diana went in to lay down her vocals. The Tammi version appears to be the same backing track with same backing vocals that was used for Miss.Ross Of course there was a lot of remixing. Also I don't recall that there was a mention of the guys on this tune. Is it the Spinners? The Originals?