George Curtis "G.C." Cameron is an American soul and R&B singer. After serving in the Vietnam War with the Marines, Cameron joined Motown act The Spinners as lead singer. He sang both lead parts on their first big hit, 1970's It's a Shame, co-written and produced by Stevie Wonder, and remained with Motown as a solo artist when The Spinners left Motown in 1971. G. C. was best known for the hit, “It’s so hard to say Goodbye to Yesterday”, on the sound track for the 1975 movie, “Cooley High.” The song has endured with music fans for generations.