The closing duet "Love is All That Matters" was expected to be released as a single but has only ever appeared as a Diana Ross solo track on her album "Everyday is a New Day".
When Kayla is singing the club, Olivia walks in and Kayla covers her mouth but the voice in the song keeps going. So, obviously it was pre-recorded and she was lip-syncing.
Peggy: [before showing her a tabloid of her and Kayla]
This is not gonna make your day. The good news is they got it right. The bad new is they got it all.