McAdams first made it on to the big screen in 2002's "The Hot Chick," looking fresh-faced and innocent with shoulder-length blonde layers.
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"I Hear Her Hair's Insured for $10,000"
She rocked stick-straight blonde hair for 2004's "Mean Girls," because nothing says "I'm a mean girl" more than long blonde hair and a pink mini skirt.
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Stunning Strawberry Blonde
McAdams' character Allie and her perfectly put-together hair stole our hearts in 2004's "The Notebook."
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But Not for Long
The actress showed up to the June 2004 premiere for "The Notebook" incognito with bangs, a choppy bob, and chocolate brown hair color.
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Red is Back in Rotation
McAdams wore her hair red with a slight wave for the MTV Movie Awards in June 2005. Perhaps she knew she was going to win "best kiss" for "The Notebook" and wanted to get the look from the movie back?
