Yasmin, Cloe, Sasha, and Jade are four inseparable teenage best friends ready to embark on their freshman year of high school in vibrant Los Angeles. Their excitement quickly clashes with the reality of high school politics when they encounter the formidable Meredith Baxter Dimly, the affluent, influential, and highly controlling student body president. Meredith has a vision for her school where everyone must belong to their assigned cliques and readily initiates efforts to categorize the students. Recognizing the independent spirit of the four friends as a threat to her plans, Meredith devises a scheme to undermine their friendship and enforce her intended social structure.
Amidst this struggle for social acceptance, each girl begins to explore her personal interests, leading them down divergent paths. Cloe, a talented soccer player, develops a crush on Cameron, causing her to drift slightly from her friends. Meanwhile, Sasha is drawn to cheerleading and joins the squad, while Jade discovers a love for fashion design after joining the science club and meeting Dexter. Yasmin, passionate about journalism, soon finds herself captivated by music and begins to focus on her singing, eventually meeting Dylan, a relaxed and charming jock who, despite being deaf, can lip-read and longs to listen to music. As each girl invests more time into her new pursuits and friendships, the once-close-knit group begins to lose their connection, becoming increasingly separated by Meredith's cliques.
The turning point comes two years later, after an accidental food fight lands the girls in detention for causing chaos, which also damages Principal Dimly's statue. The source of their conflict? None other than Meredith, who sends her pet dog Paris to disrupt Cloe’s interaction with Cameron. This incident reminds them of the bond they once shared, prompting a heartfelt decision to reconnect and encourage their classmates to socialize beyond their prescribed cliques. However, complications arise when they realize they were not invited to Meredith's "Super Sweet 16" birthday bash; instead, they find themselves behind the scenes, catering to the lavish event due to Cloe’s mother’s job.
During this party, tensions rise when Meredith threatens to reveal an embarrassing secret about Yasmin—video footage of her dancing and singing while wearing a face mask. The tide begins to turn, though, during a fun conga line initiated by Dylan and Yasmin's brother Manny, which culminates in Meredith being unceremoniously dumped into a pool alongside her friends, turning the event into a spectacle.
The following day at school, the girls, fueled by a newfound sense of camaraderie, decide to enter the talent show in hopes of winning a scholarship, a title usually claimed by Meredith. As the competition heats up, Meredith resorts to blackmail, trying to force the girls to withdraw by using an embarrassing photo against them. However, her plan backfires spectacularly, leading to a series of surprising revelations from other students that unite the cliques against the common adversary. In an impressive display of talent, the girls perform an elaborate number that brings the house down.
Ultimately, the competition culminates in an unexpected tie, but the Bratz triumph in the hearts of their peers, while Meredith takes home the trophy. The girls decide to award Cloe the scholarship, and their journey leads them to a stunning opportunity for an appearance at a red carpet gala offered by an MTV vice president, all while Meredith and her father, Principal Dimly, futilely try to dismantle their newfound success.
