The most unforgivable teen movie moments haven't aged well. Our countdown includes "Grease," "Mean Girls," "Sixteen Candles," and more! Which teen movie moment do YOU think is the most unforgivable? Let us know in the comments!

Watch more great teen movie videos here:
Top 10 Teen Movies That Wouldn't Work Today -    • Top 10 Teen Movies That Wouldn't Work...  
Top 10 Stereotyped Characters in Teen Movies -    • Top 10 Stereotyped Characters in Teen...  
Top 10 Unrealistic Expectations We Got from Teen Movies -    • Top 10 Unrealistic Expectations We Go...  

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