What singer signed a contract with Def Jam Recordings at age 19 and was mentored by LA Reid and Jay-Z?
So Amazin':  During production, Milian was mentored by L.A. Reid and executive producer Jay-Z of Def Jam Recordings. Christina Milian: Christine Flores (born September 26, 1981), better known as Christina Milian ( ), is an American singer, songwriter and actress. Christina Milian:  At the age of 19, Milian signed a contract with Def Jam.
Christina Milian