The Loop (TV)
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Olivia Olson is an American singer and actress. She was the original singer of Haven't You Noticed (I'm a Star), and has also done voice acting on Disney's Phineas and Ferb as Vanessa Doofenshmirtz, and on Adventure Time as Marceline Abadeer.
- She is the only voice actress whose character doesn't physically appear on the show (excluding the photo on the CD) and didn't have any non-singing speaking lines.
- The woman on the CD resembles Vanessa from Phineas and Ferb, and Marceline from Adventure Time, both voiced by Olivia.
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