Kelly was a character who first appeared in Season 10. She was portrayed by Alexandra O'Brien. She was a contestant for the song Mr. Knickerbocker. Appearances Can You Sing That Song? Sharing The Emperor's Contest Trivia BJ appeared in all of her appearences. Retrieved from "https://barney.fandom.com/wiki/Kelly_(Alexandra_O%27Brien)?oldid=226754" Categories: Characters Season 10 Cast Human Characters Female Characters Season 9 Cast Season 11 Cast Kids Minor Kids Community content is available under CC-BY-SA unless otherwise noted.