While the use the Chipmunks "concert in Paris, Dave Seville (Jason Lee) suffers a heavy accident if Alvin (Justin Long) jumps on a scaffolding and a sinking Billboard Dave sends fly above the stage in electric devices. After the accident he is delivered to the hospital. Even if he survives, he has to go for a few days to recover, he leaves the decayed 21-year-old cousin Toby (Zachary Levi) and aunt Jackie (Kathryn Joosten), responsibly for the Chipmunks, until he comes again. Before the event Dave Alvin Regelungen had made for them to go to school Simon (Matthew Gray Gubler), and Theodore (Jesse McCartney). But on the airport, aunt Jackie a few steps falls down and an airport baggage car falls in them. She has to go to the hospital, thus Toby people responsible leave remains. Little Toby do not know, on her first day at school, the Chipmunks unwell feel with all racquets if Ryan, one of the racquets, gives Simon swirlie. The boys have fun, even a big child fitted from Toby, above all because he basically. Theodore tries, however, connection with Toby Toby is always too briefly to him or has to frighten something Theodore (e.g., told him a frightening history about eagle and passing on gas). One night, Toby Nintendo plays Wii with the boys, however, Alvin ends threw to the Wii remote control in the television and breaks it. The young question, why Toby is so childish and also asks, how was his High School experience (what to Toby with frightening flashbacks of the being pesters and bothers all the time).
Today, in the meantime, Hawke Ian (David Cross) the greedy soundtrack editor lives in the cellar of the jet Records. However, there comes a FedEx mail to the building and a package precipitates. And three singing stripe croissants women, the Chipettes, Brittany (Christina Applegate), Jeanette (Anna Faris) and Eleanor (Amy Poehler) of the package come, and fancy. Brittany says that since Ian closed the Chipmunks stars, they want to stars. And they accept "singen Put Your Records On", around Ian. He acts, she says that the Chipmunks of him away, spitted him ran, and did not allow to trust him with broken heart, with it the Chipettes to them. He leaves the Chipettes to stay in his flat (in reality, burglary in a model suite) and have her own association mirror. Meanwhile, the Chipmunks concert of the school give up to 25,000$ win and the school music programme to store. The tension between Alvin and Simon furthermore as Alvin does itself with jocks of the school to build, but that, is strongest concerned Theodore who believes, loses his brothers fight with them all the time. In the meantime, is Toby with his High-School-crush Julie (Anjelah Johnson) who unites now class teacher the Chipmunks' teacher again. Apparently he is in love in them, but it is too much fear to say something.
The Chipmunks fulfil the Chipettes and fall in love into each other, however, are soon forced, a rivalry after the discovery that they are with Ian have. The Chipettes sing "Hot N Cold", around Dr. Rubin (Wendie Malick), you give those of the headmasters this in the competition. The Chipmunks and the Chipettes mutually in a Battle of the tape. Alvin meets by Brittany, divide slightly romantic moments with her, until he them warns about it, about that what does not believe Ian on him and his brothers, but them not, Alvin. Then Alvin humiliates Simon before all if he says to think one jocks to him, now he is thrown the school throw monitor and Simon Trick, in the end, again on the garbage. In the meantime, Ian Eleanor gives some plateau shoes, she has to go "on the work becomes bigger." On the concert, the Chipettes sing "single ladies (Put a ring on It)." Eager to get rich, Ian Videobänder of the Chipettes achievement and books it on YouTube, together with his telephone number. The Chipettes win, after Simon and Theodore the competition goes to ruin because Alvin do not appear (he hung with the football team instead of). Finally, Alvin to only points to see that everybody has gone. Alvin says Brittany that he do not look, but she made to herself and everybody that they Ian never wanted the way to win. If Alvin returns home, Simon and Theodore state, they sleep and ignore him. The embarrassment is to be seized too much for Theodore, it flees in the zoo, in hope, with the long-tailed monkeys live, after he Meerkat Manor. If Toby and the boys him and preserve him from an eagle to find, it brings the best from all to five of them and the Chipmunks everything forgive for each other and go back "to One for everybody, and three for". (As Theodore formulated it)
The Chipettes are soon put as a pregroup with Britney Spears concert in the Staples centre. Jeanette says the concert in the same evening in the school concert, thus Ian decides the air to sprinkle the battle and you take the Chipettes lead with the concert. Because, nevertheless, he concentrates upon Brittany, he wants to sing them only on the stage to carry out, while Jeanette and Eleanor Backup. Brittany refuses, without her sisters sing, thus Ian threatens to grill them in a restaurant if they do not do this. At school Alvin gets a phone call from Brittany, said that they and her sisters were closed in a cage. To open Alvin Rennen to store them on his red motorcycle, while Simon Jeanette tells, how the cage on the phone. The Chipettes escape from the cage, rise from the saloon, and they directly on the motorcycle Alvin's. (Digger, from NASCAR on FOX TERRIER, makes a Cameo during the hunt) During hunted, does not apologise to Brittany to Alvin for listen, him about Ian. Ian pursues them with a R.C. Helicopters, but they jump from the motorcycle and reach on the helicopters. Jeanette catches to themselves the remote control and steers the helicopter of Ian, while the motorcycle drives directly in the strip area Ian's. Simon and Theodore are about the concert goes to ruin again, but Toby states for the time. Toby goes on the stage and announcements Julie. He is too nervous, but he gets to improvise a song Julie (who tells basically, how he feels about them). Julie accepts and they embrace later. Alvin and the Chipettes fly in the hall on the helicopter, and everybody sings "We ares Family". Then Dave comes back again and looks to them lead, together with Toby and Julie. In the meantime, Ian Kleider pathetically to Brittany, which with the middle only, while one him boo, the Chipmunks and Chipettes "Shake Your Groove Thing" sing. In this song, everybody dances on the stage with the Chipmunks and Chipettes (including Dave, to dance tried, even if he is paralyzed). Finally, go the Chipmunks with home Dave, while Toby goes back home. The Chipettes are remitted once more at the request of the boy in the house sleep and the Chipmunks "where Dave to another damage, tripping over skateboard Alvin and walk he the famous sentence" ALVIN! "Like the credits, the screen shows photos of the Chipmunks and Chipettes on the beach, in Christmas, in the kitchen, in the garden, and with aunt Jackie. An epilogue shows Ian it is thrown in a garbage container behind the scenery by the guards. During the cleaning are jocks from rubber of the rostrum with Dr. Rubin about them watches and Alvin and the Chipmunks: The Squeakquel download
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