Delia Juanita Warrick, known professionally as Dee Dee Warwick, was an American soul singer. Born in Newark, New Jersey, she was the sister of Dionne Warwick, the niece of Cissy Houston, and the first cousin of Whitney Houston. She died in Essex. Delia Juanita Warrick (Septem – Octo), known professionally as Dee Dee Warwick, was an American soul singer. Dee Dee Warwick American singer. Younger sister of Dionne Warwick, cousin of Whitney Houston, niece of Cissy Houston. Changed her name from "Warrick" to ". One of the most powerful soul singers of all time, Dee Dee Warwick was born Delia Warwick on Septem, in Newark Heights, New Jersey. Whitney Houston's mother responds to new documentary's claims singer was abused by cousin Dee Dee Warwick · Whitney Houston's mother Cissy has. Houston's half-brother, Gary Garland-Houston, alleges Dee Dee molested him and Whitney when he was aged between seven and nine, claims. Like Darlene Love and Cissy Houston, Dee Dee Warwick's considerable gifts as a soul singer were mostly confined to session work. And like Aretha Franklin's. Last year, filmmakers for the documentary “Whitney” alleged the singer was molested by her cousin Dee Dee Warwick, sister of singer Dionne. Who was Dee Dee Warwick? Singer accused of sexually abusing Whitney Houston · She was born into a family of singers. · Warwick sang backup for. Dee Dee Warwick was an American soul singer, and the sister of singer Dionne Warwick. She had several hits in the US, including the original.