http://www.squidoo.com/numberonesongsof1969videoshowcase Their number one song from 1969 and into 1970. This song was number one for one week.
In this song, Johnny Bristol was harmonizing with Diana to help her with the song. They decided to use the track as is. The background vocals are not of Mary Wilson and Cindy Birdsong but rather it is with Maxine and Julia Waters.