LRoc is a staff songwriter and producer at Jermaine Dupri's So So Def Recordings. He has co-written and co-produced singles like Mariah Carey's "Get Your Number" and Murphy Lee's "Wat Dat Hook Gonna Be" Jermaine Dupri (born Jermaine Dupri Mauldin on September 23, 1972 in Atlanta, Georgia) is an African-American record producer and rapper. ... So So Def Recordings is a record label, based out of Atlanta, Georgia and owned by Jermaine Dupri, specializing in Southern hip hop, R&B, and bass music. ... Mariah Carey on the cover of The Emancipation of Mimi (2005). ... Get Your Number is the third internationalsingle from Mariah Careys 14th album, The Emancipation of Mimi. ... Murphy Lee (born Tohri Harper in 1983 in St. ...