Olivia Olson is an American actress and singer.

She was mostly known for her voice roles as Vanessa Doofenshmirtz in Phineas and Ferb and Marceline in Adventure Time. She was also known for her voice role as Blisstina Utonium in the 2016 reboot of Cartoon Network's The Powerpuff Girls.

She provides the voice of Lydia in the series and Clarice in the film The Robotboy Movie: So The Drama.

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