Andrew Luis "Dru" Castro is a Grammy Award Winning recording engineer, producer and songwriter in Atlanta, Georgia. He has produced or engineered songs for artists such as Ciara, Keyshia Cole, Usher, R. Kelly, T-Pain, Trina, Jamie Foxx and India.Arie. Recently, Castro produced and wrote songs with the Grammy award winning singer/songwriter India.Arie on her recently released album Testimony: Vol. 2, Love & Politics. Her 2006 album, Testimony: Vol.