Kevin 'K.C.' Cossom (born September 2, 1984) is an American singer, Grammy-nominated songwriter, producer and arranger. Born in Philadelphia, Pennsylvania and raised in Orlando, Florida, Cossom has written for a variety of artists including Keri Hilson ("Knock You Down" featuring Kanye West and Ne-Yo) and Mary. J Blige. He is signed to Grammy Award-winning producer Danja's label, N.A.R.S./RCA Records.