Sometimes its for a role, sometimes it just because they're wacky, but whatever the reason celebrities can go through some amazing transformations.
Christian Bale in "The Machinist"
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Christian Bale in "The Dark Knight"
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Charlize Theron in "Monster"
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Of course, Michael Jackson
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Robert Deniro in "Raging Bull"
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Robert Deniro, again in "Raging Bull" (no, that is not a fat suit)
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Jared Leto as Mark David Chapman
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Carrot Top, before
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Carrot Top, after
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