I understand that the original backing track for the song was cut in Detroit. Has anyone heard it before? Does it exist? Was it any different than the released version? Were there vocals ever added to this version? I ask because I actually do really like the backing track we all know.

Also it's said that this is one of those songs that Mary and Flo sang on with the Andantes. But the backgrounds don't have that same sound as Stop where its M/F/As which has a full sound where the track in question sounds a little thinner. Are some parts of the song just M and F while others are the A's or did the A's completely replace M and F's original track?