Frederick Knight is an American R&B singer, songwriter, and record producer, known for his smooth, soulful vocal style and deep, emotive lyrics. He gained prominence in the 1970s with his hit single "I've Been Lonely For So Long," which became a signature of southern soul music. Knight's contribution to the music industry extends beyond his own performances, as he has written and produced several successful songs for other artists. His work has significantly shaped the landscape of American soul and R&B music.