Catherine Janet "Cathy" Cavadini (born April 21, 1961, in Long Beach, California) is an American voice actress and singer. She is most famous as the voice of Blossom on Cartoon Network's animated television series The Powerpuff Girls and Tanya Mousekewitz in An American Tail: Fievel Goes West and the spinoff show Fievel's American Tails. She is also the successor voice actress for Casey Jr. in the Disney Universe after Margaret Wright died.

In 2003, Catherine was honored with a White House Project Epic Award (which gives recognition to projects that promote women leadership) for her work in The Powerpuff Girls Movie as Blossom. In 1998, Catherine was nominated for an Annie Award for "Outstanding Individual Achievement for Voice Acting by a Female Performer in an Animated Feature Production" for performing the voice and singing for the role of Mary in the animated movie Babes in Toyland.

She also sang Dreams to Dream herself in the film An American Tail: Fievel Goes West, which was nominated for Best Song at the 1992 Golden Globe Awards, as well as the song The Girl You Left Behind in the same film. In addition, she has received 2 Emmy Award Certificates for contributing to Outstanding Sound on the TV series, The X-Files.

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