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Norwegian soprano Sissel Kyrkjebø performed the haunting, wordless vocals that are woven throughout James Horner's instrumental score in the 1997 film Titanic. Although Celine Dion sang the hit end-credits song, Sissel's ethereal voice provided the signature emotional sound within the movie itself. Credit: Paramount Pictures, 20th Century Fox, and Sony Classical | History In Pictures

108K views · 433 reactions | The voice actress for Boo in Monsters, Inc., Mary Gibbs, was a toddler who could not read or sit still for traditional recording sessions. Instead, Pixar filmmakers followed her around the studio with a microphone, capturing her natural chattering, giggles, and spontaneous sounds. These audio snippets were then edited together to create the character's uniquely authentic and charming dialogue. Credit: Disney | History In Pictures | Facebook