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Singers in the Video: Beyoncé (B4), Jessie J (C5), Whitney Houston (C#5), Jennifer Hudson (D5), Ariana Grande (Eb5), Tori Kelly (E5), Mariah Carey (F5), Cynthia Erivo (F#5), Lara Fabian (G5), Celine Dion (G#5), Demi Lovato (A5), Nicole Scherzinger (Bb5), SoHyang (B5), Amber Riley (C6).