Olivia has worked with the following music producers: Rick Nowles, Camara Kambon, and Rob Mullins (Hollywood jazz great).
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.
Olivia has performed live in many Hollywood theaters, such as The Comedy Central Stage.
Olivia has written songs for Disney's animated series Phineas and Ferb.
Olivia has both of her ears pierced.
Olivia was called an nerd on Ellen: The Ellen DeGeneres Show for being the winner of a science fair.
Olivia's father is a legendary comedy writer named Martian Olson.
She sang 'All I want for Christmas is You' in the blockbuster love comedy Love Actually, alongside Hollywood stars Hugh Grant and Colin Firth.