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    21 Celebrities Who You Didn't Know Voiced Your Favorite Cartoons

    Michael Cera is everywhere.

    1. Elizabeth Taylor as Maggie Simpson

    The Simpsons

    2. Fergie as Sally Brown

    The Charlie Brown and Snoopy Show

    3. Jaleel White as Sonic the Hedgehog

    Adventures of Sonic the Hedgehog and Sonic Underground

    4. George Takei as Ricardio the Heart Guy

    Adventure Time

    5. Michael Cera as Brother Bear

    The Berenstain Bears

    6. Hayden Panettiere as Dot

    A Bug's Life

    7. Andy Lawrence as T.J. Detweiler


    8. Christian Bale as Thomas


    9. John Ritter as Clifford

    Clifford the Big Red Dog

    10. Whoopi Goldberg as Gaia

    Captain Planet and the Planeteers

    11. Lacey Chabert as Eliza Thornberry

    The Wild Thornberrys

    12. Ralph Fiennes as Rameses

    The Prince of Egypt

    13. Vin Diesel as The Iron Giant

    The Iron Giant

    14. John Goodman and J.K. Simmons as the Yellow M&M

    15. Howie Mandel as Gizmo


    16. Christopher Plummer as Charles Muntz


    17. Erik Von Detten as Sid

    Toy Story

    18. Andy Samberg as Party Pat

    Adventure Time

    19. Haley Joel Osment as Chip

    Beauty and the Beast: The Enchanted Christmas

    20. Pat Morita as The Emperor of China


    21. And James Avery as Shredder

    Teenage Mutant Ninja Turtles