Anne Altieri played multiple characters in the Halloween special "It's the Great Pumpkin, Charlie Brown," including vain and curly-haired Frieda. But she had a strange experience hearing herself on the show years later.
"It's funny, when I listen to the show now, I don't recognize my voice at all ... but I remember every feeling I had about every line I delivered 39 years ago," Altieri said (via The Washington Post). The performance came with a price too. Altieri also remembers throwing up after every session.
Still, Altieri appeared as either Violet or Frieda in later "Peanuts" specials, such as "You're in Love, Charlie Brown" and "A Boy Named Charlie Brown," until 1969 (via IMDb). Like many of the child actors cast in the "Peanuts" specials, she appears to have retired from voice acting afterward. Maybe it's enough that her voice has been heard on broadcast television for decades when "It's the Great Pumpkin, Charlie Brown" airs every Halloween.