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Olivia Olson

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Olivia Olson

Olivia Olson (born May 21, 1992) is an American actress and singer-songwriter. She is known for her role as Joanna singing "All I Want For Christmas Is You" in Love Actually (2003), and for voice-roles as Marceline the Vampire Queen on Adventure Time with Finn and Jake and has voiced a few minor roles on Disney Channel in her past and still does from time to time.

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