Frederick Knight (born in Birmingham, Alabama, USA on 15 August 1944) is an American R&B and soul singer / songwriter / producer. Knight recorded with Mercury and Capitol in New York before signing with Stax Records in 1972. He had his only UK hit single, "I've Been Lonely For So Long," in 1972. The song was on the chart for 10 weeks and reached number 22. Lack of further chart activity leaves him labeled as a one-hit wonder. However, Knight did appear in the documentary film, Wattstax, which was released in 1973.