Mean Girls - 2004
Mean Girls has transcended space and time with its hilarious rendition of high school drama. Cady Herron (Lindsay Lohan) transfers to a suburb high school from her homeschooling in Africa. Mean girl Regina George (Rachel McAdams) and her posse of "plastics" end up adopting the new girl when they realize that people seem to like her. Cady learns the ins and outs of the "girl world" and ended up becoming what she despised most.
Even though the film came out 17 years ago, it's relevant enough to be quoted on the daily, even by viewers who weren't born when the movie came out. Iconic quotes include, "On Wednesdays, we wear pink," "On October third, he asked me what day it was," and of course, "That's so fetch."