Katharine McPhee and David Foster Perform "Jingle Bell Rock"

Katharine McPhee and David Foster sing "Jingle Bell Rock"

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McPhee and Foster perform in an exclusive clip from The Wonderful World of Disney: Magical Holiday Celebration.

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Foster, 73, plays the piano and sings while McPhee, 38, wears a sparkling gown.

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The crowd is singing along with McPhee and swaying from side to side as they do so.

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The event will premiere days after McPhee and Foster published their first Christmas-themed album.

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"We thought we'd put a couple songs on Spotify, but then we made a seven-song EP," McPhee said.

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"I adore the fact that we are able to accomplish everything together.

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