Mary Kay Bergman

Mary Kay Bergman (June 5, 1961, Los Angeles, California, USA – November 11, 1999, Venice, Los Angeles, California, USA), credited on the first three seasons of South Park as Shannen Cassidy, was an American voice actress and voice-over teacher. 
Born in Los Angeles, she had an interest in fantasy and animation early in her life. She acted in plays in high school and also studied theater at UCLA. After unsuccessful acting jobs, she was considering a career in the Air Force, when "going wild" on karaoke at a housewarming party changed her life. In 1989, she began voicing the Disney character Snow White. Bergman is widely known for her voice work in the earliest seasons of South Park and The Fairly OddParents. She did voice work for over 400 television commercials.
Bergman was the wife of actor, director, producer and screenwriter Dino Andrade, whom she married in 1990. Bergman suffered from bipolar disorder, and committed suicide in November 1999. Shortly after her death, Andrade established the Mary Kay Bergman Memorial Fund. She is buried at the Forest Lawn Memorial Park in Hollywood Hills.
Year	Image	Character  	Title
1999	 	Jessie (Songs)	Toy Story 2