You Still Believe In Me
You beat me to it!! This one is by far my favorite! After that, would probably be Wouldn't It Be Nice. There were vocal elements to that song that I never knew were there until I heard the Stak O'Vocals version.
PMcC, are you saying you have heard a vocals only mix of Susie Cinncinati and It's OK or just that you like the group vocals? I would love to hear these sans music!