"On November 11, 1967, Diana and the Supremes hit the Hot 100 at a confident No.65 with their latest Holland-Dozier-Holland creation, “In And Out Of Love.” Written with the working title “Summer Good, Summer Bad,” its vocal session in June was a poignant farewell for Florence Ballard, at what became her last track date.

Soon afterwards, she was summarily removed from the group and replaced by Cindy Birdsong. To add further insult, her vocals on the recording, and Mary Wilson’s, were then overdubbed for those of the Andantes."

When it says that their voices were overdubbed, does that mean that they were removed or erased and replaced by the Andantes, or does it mean that their voices were supplemented or enhanced with the Andantes voices?

https://www.yahoo.com/now/love-flore...085147241.html