Rachel McAdams in 'Mean Girls'
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10 Good Girls Who Went Bad For The Big Screen
7. Rachel McAdams in 'Mean Girls'
She might not technically be a criminal but Regina George is still high up on our list of Hollywood's best bad girls (she did more damage than most during her reign of The Plastics). Rachel McAdams said goodbye to the good girl roles of her child acting career to play the high school 'it' girl. Picture: Rex