The key people who helped the trio get going were musical arranger Milton Okun and star performer/singer Harry Belafonte. Okun provided a professional polish to their performing skills, which helped them gain both a key booking at New York City's Blue Angel club and radio appearances with Arthur Godfrey and television appearances with Pat Boone. Belafonte had them appear as back-up singers, with a small featured spotlight, in his May 1960 Carnegie Hall concert and signed them to his Belafonte Enterprises management firm.