ENOUGH IS ENOUGH is a terrific duet; I remember it was such a mainstay at NYC discos. Barbra Streisand has the penultimate female voice. Hers is in a category at the pinnacle of a gigantic pyramid of great American singers. Donna Summer too had her own God-given sound, a voice of great beauty and musicianship. And now, sadly, it belongs only to history and is in a pyramid just under Barbra's, that also includes Billie, Ella, Sarah, Aretha, Whitney, and Christina, all voices of true beauty. RIP...