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The Simpsons' Greatest Guest Stars

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Zooey Deschanel, The Simpsons
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Zooey Deschanel

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Lady Gaga

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Michael Jackson

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Michael Jackson

While MJ may have played a mental patient on The Simpsons, he made another important contribution to the show's success. That's right, the immortal words "if you can do the Bartman, you're bad like Michael Jackson" were written by the gloved one himself!

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Conan O'Brien

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Alec Baldwin

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Betty White

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Lady Gaga & Elton John

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Elton John

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Meryl Streep

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Natalie Portman

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Ricky Gervais

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Halle Berry

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Kelsey Grammer

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Britney Spears

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'N Sync

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Anne Hathaway

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Randy Jackson, Ryan Seacrest, Paula Abdul & Simon Cowell

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Dustin Hoffman

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Paul & Linda McCartney

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Coldplay

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Ludacris

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Metallica

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Paul Rudd