<Li> Lena Horne as herself ("Cliff's Birthday", season 1) </Li> <Li> Iman as Mrs. Montgomery ("Theo and the Joint", season 1) </Li> <Li> Danny Kaye as Dr. Burns ("The Dentist", season 2), in one of his last TV appearances </Li> <Li> Alicia Keys as Maria ("Slumber Party", season 1) </Li>

Who played martin's mom on the cosby show