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Most Beautiful 2013

Celebrity Look-Alikes

From Keira Knightley & Natalie Portman to Zooey Deschanel & Katy Perry, see who else has a Hollywood ringer

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AMY & ISLA

Not only is Fisher aware of her likeness to fellow redhead Adams, she's not above using it to her advantage. "If [Confessions of a Shopaholic"] is a hit, it was Isla Fisher in the movie," she joked prior to the release of the 2009 rom-com. "And if it doesn't work out, it was Amy Adams."