I can clearly hear the Marvelettes on the Pink Album but after that I struggle with the exception of a few songs. Besides that I do like the Marvelettes on the background. It always gives that more down to earth and group sound. Same with the Vandellas after Watch Out. Never really been able to pick out Lois on any song. The background vocals on Honey Chile for example are way too soft. Cindy seems to have recorded background mostly during late '67 and early '68 during the timeframe of the recording for songs for Reflections. But does anyone hear Mary on the Heaven Must have sent you and Then? You can hear both Cindy and Mary at the end of Stay in my lonely arms when the Andantes are not in the mix anymore very clearly. Because I can't hear Mary on the two songs mentioned I was wondering if they were like test for Cindy on background. I would assume that if Cindy was singing background that Mary would be there too.