Sixteen-year-old homeschooled Cady Heron (Lindsay Lohan) and her zoologist parents (Ana Gasteyer and Neil Flynn) return to the United States after a research trip in Africa, settling down in Evanston, Illinois. Attending a public school for the first time, Cady meets new classmates Janis (Lizzy Caplan) and Damian (Daniel Franzese). The two warn Cady to avoid the school's most popular clique, the "Plastics", who are led by queen bee Regina George (Rachel McAdams) and include rich but insecure Gretchen Wieners (Lacey Chabert) and sweet airhead Karen Smith (Amanda Seyfried). The Plastics take an interest in Cady, and invite her to sit with them at lunch. Seeing that Cady is getting along with the Plastics, Janis hatches a plan of revenge against Regina for some past slight, using Cady as the infiltrator.Cady soon learns about Regina's "Burn Book", a journal filled with rumors, secrets, and gossip about the other girls and some teachers at school. Despite this discovery, Cady decides to forgo Janis's scheme for ethical reasons. Meanwhile, Cady begins to have a crush on Regina's ex-boyfriend, Aaron Samuels (Jonathan Bennett), whom a jealous Regina proceeds to steal back at a Halloween party in front of Cady. This spurs Cady to fully commit to Janis's plan to cut off Regina's "resources", which involve breaking Regina and Aaron up, tricking her into eating nutrition bars that actually make her gain weight, and turning Regina's fellow Plastics against her. In the process, Cady unwittingly remakes herself in Regina's image, becoming spiteful and superficial, and abandons Janis and Damian.When Regina is finally made aware of Cady's treachery, she retaliates by spreading the contents of her Burn Book all over the school, quickly inciting a riot. To avoid suspicion, Regina inserts a fake libel of herself in the book in order to blame Cady, Gretchen, and Karen, the only female students not mentioned in the book. Principal Duvall (Tim Meadows) soon quells the riot, and gathers all the girls in the school in the gymnasium. Math teacher Ms. Norbury (Tina Fey), whom the Burn Book defamed as a drug dealer, makes the girls face the terrible way they all treat each other, confess their transgressions, and apologize to each other and the teachers. When Janis's turn comes, she confesses her plan to destroy Regina with Cady's help, and openly mocks Regina with the support of the entire school. Pursued by an apologetic Cady, Regina storms out and gets hit by a school bus, breaking her spine.Without any friends, shunned by Aaron, and grounded by her parents, Cady takes full blame for the Burn Book. After making amends with Regina, Cady's guilt soon dissolves and she returns to her old personality. As part of her punishment for lying and failing Norbury's class, she joins the Mathletes in the state championship finals, and ends up winning the competition for her team after her opponent answers incorrectly. At the Spring Fling dance, Regina's new boyfriend, Shane Oman, is elected King, while Cady is elected Queen. Onstage, Cady declares that all her classmates are wonderful in their own way, breaks her plastic tiara, and distributes the pieces to some other girls. She then makes amends with Janis and Damian, reconciles with Aaron, and reaches a truce with the Plastics, who then disband.By the start of the new school year, Regina has joined the lacrosse team to deal with her anger, Karen has become the school weather reporter (claiming earlier that her breasts can tell when it is raining), and Gretchen joins the "Cool Asians". Aaron graduates from high school and attends Northwestern University, Janis begins dating Kevin Gnapoor, whom she initially despised, and Cady declares that she is now normal. A group of new "Junior Plastics" has arisen, and Cady imagines them being hit by a bus.
Question: Why does Cady forgo Janis' scheme?, Answer: Ethical reasons Question: Who plays the math teacher?, Answer: Tina Fey Question: Is Cady grounded by her parents?, Answer: yes Question: In what finals does Cady join the Mathletes?, Answer: state championship finals Question: Who does Cady have a crush on?, Answer: Reginas ex-boyfriend Aaron Samuels Question: Who is the principal of the school?, Answer: Duvall. Question: Who does Cady make ammends with?, Answer: Regina Question: What group does Cady join?, Answer: Mathletes Question: Who takes blame for the Burn Book?, Answer: Cady Question: Who leads the Plastics?, Answer: Regina George Question: What is the name of Regina's book?, Answer: The Burn Book. Question: Who plots revenge against Regina?, Answer: Janis Question: Janis' plan is to cut off Regina's what?, Answer: Resources Question: What do the Plastics invite Cady to do with them at lunch?, Answer: Sit with them Question: Who shunned Cady?, Answer: Aaron Question: Janis wants who's help in order to destroy Regina?, Answer: Cady. Question: Who inserts a fake libel of herself in the book.?, Answer: Regina. Question: What party was Cady at when Regina stole Aaron back from her?, Answer: A Halloween party Question: What does Cady do to Janis and Damian?, Answer: Abandons them. Question: Who is Regina's new boyfriend?, Answer: Shane Oman Question: Does Cady have lots of friends, or no friends at all?, Answer: no friends at all Question: Who gets hit by a school bus?, Answer: Regina. Question: What is contained inside Regina's "Burn Book"?, Answer: Rumors and gossip about school staff and students. Question: Who old is Cady?, Answer: 16 Question: Who imagines the "Junior Plastics" being hit by a bus?, Answer: Cady Question: Who breaks her spine at the end of the movie?, Answer: Regina. Question: Who does Regina retaliate against?, Answer: Cady Question: What does Cady give Regina to make her gain weight?, Answer: Nutrition Bars Question: Cady and her parents return to the US after a research trip in what country?, Answer: Africa Question: What is the school's most popular clique called?, Answer: The Plastics Question: What is name of the most popular clique?, Answer: the "Plastics" Question: Where does Regina steal Aaron from Cady?, Answer: The Halloween party Question: What sports team does Regina join?, Answer: Lacrosse Question: Who quells the riot?, Answer: Duvall. Question: What does Cady take full blame for?, Answer: the Burn Book Question: Who does Janis use as an infiltrator?, Answer: Cady Question: Where did Cady live before she moved to Evanston, Illinois?, Answer: Africa