Celebrities with Over-the-Rainbow Hair!
Credit: Dean/Keola Media/NPG.com
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Jennifer Lawrence Gets Naked — and Blue — 
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Dianna Agron
The Glee actress, 25, brightened things up with a bold, pink 'do on Aug. 11, explaining to fans via Twitter that the hair change was for a role: "Hey all! The pink is for work....Thanks for all the nice comments on it! #barbiepink."