Roots of Barbra Streisand

Il Divo are a multinational classical crossover vocal group. Formed in the United Kingdom in 2003, it is a male quartet that was created and then promoted by British media magnate Simon Cowell for Syco Music, a record label that he had administered. The original members selected by Simon Cowell are Swiss tenor Urs Bühler, American tenor David Miller, French tenor Sébastien Izambard, and Spanish baritone Carlos Marín.

Paul Frederick Jabara was an American actor, singer, and songwriter. He wrote Donna Summer's Oscar-winning "Last Dance" from Thank God It's Friday (1978), as well as "No More Tears ", Summer's international hit duet with Barbra Streisand. He also co-wrote the Weather Girls' iconic hit "It's Raining Men" with Paul Shaffer.

The Ikettes were a female backing vocal group for R&B duo Ike & Tina Turner, performing primarily as a trio, though occasionally expanding to a quartet. The group originated in 1960 when Ike Turner recruited members of Art Lassiter's backing trio, the Artettes—Robbie Montgomery, Frances Hodges, and Sandra Harding—to record "A Fool in Love" with Tina Turner after Lassiter failed to appear for a scheduled session. Following the success of the single, Turner formed the Ike & Tina Turner Revue and assembled a new backing group, soon known as the Ikettes.

Earl Stephen Bishop is an American retired singer-songwriter, guitarist, and actor. His biggest hits include "On and On", "It Might Be You", and "Save It for a Rainy Day". He has also written songs for many other artists, such as Barbra Streisand, Phil Collins, and Art Garfunkel. He has contributed music and acted in films including National Lampoon's Animal House.