Iconic singer Barbara Streisand recently recruited on of her famous friends for a duet! Streisdand reached out to "30 Rock" actor Alec Baldwin for some musical backup during her appearance on "The Tonight Show with Jimmy Fallon." The two teamed up for a performance of the Broadway standard "The Best Thing That Has Ever Happened," a duet that also happens to be featured on Streisand's new album, "Encore: Movie Partners Sing Broadway." Her latest record also features surprising collaborations with Anne Hathaway, Daisy Ridley, Hugh Jackman, Chris Pine and Seth MacFarlane.