Lindsay Lohan joins which A-list clique at her school in the 2004 film "Mean Girls"?

Mean Girls is a 2004 American teen comedy film directed by Mark Waters and written by Tina Fey. The film is based in part on Rosalind Wiseman's non-fiction self-help book Queen Bees and Wannabes, which describes female high school social cliques and the damaging effects they can have on girls.

Sixteen-year-old homeschooled Cady Heron and her zoologist parents return to the United States after a 12-year research trip in Africa, settling down in Evanston, Illinois. Attending a public school for the first time, Cady meets new classmates Janis Ian and Damian Leigh. The two educate Cady on the school's various cliques and warn her to avoid the most popular and infamous one, the "Plastics", who are led by queen bee Regina George and include rich but insecure Gretchen Wieners and sweet airhead Karen Smith. 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.