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Olivia has worked with the following music producers: Rick Nowles, Camara Kambon, and Rob Mullins (Hollywood jazz great).
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Olivia was trained for singing in Love Actually because the director was afraid the audience wouldn't believe an 10 year old could sing that well.
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Olivia has performed live in many Hollywood theaters, such as The Comedy Central Stage.
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Olivia has written songs for Disney's animated series Phineas and Ferb.
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Olivia has both of her ears pierced.
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Olivia was called an nerd on Ellen: The Ellen DeGeneres Show for being the winner of a science fair.
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Olivia's father is a legendary comedy writer named Martian Olson.
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She sang 'All I want for Christmas is You' in the blockbuster love comedy Love Actually, alongside Hollywood stars Hugh Grant and Colin Firth.