G. C. (George Curtis) Cameron sang "It's So Hard To Say Goodbye To Yesterday" (Freddie Perren - Christine Yarian) in the 1975 movie "Cooley High". The original reached number thirty-eight on Billboard's R&B listing. G. C. was once the lead vocalist for The Spinners and later sang lead for The Temptations.

The Boyz ll Men (Michael McCary, Nathan Morris, Wayne Morris and Shawn Stockman) a cappella version of "It's So Hard To Say Goodbye To Yesterday" topped the R&B chart in 1991 while reaching number two on the Top One Hundred. The single is on the group's debut LP "Cooleyhighharmony" which won the Grammy for Best R&B performance by a Group or Duo with Vocals.