plot in a nutshell represent dave seville and father figure and manager of the chipmunk brother alvin and simon and theodore and have go off to europe on a business trip and leave the boy at home with miss miller a their watcher and much to the chagrin of alvin and who want to go to europe . while play against his female counterpart and brittany and the leader of the chipettes and comprise of her young sister jeanette ( the female counterpart of simon ) and eleanor ( the female counterpart of theodore ) in a fierce arcade game of around the world in 30 day and they catch the attention of two evil foreign sibling who need to smuggle money and diamonds around the world and but need a way to do it that would not draw the attention of their arch enemy and jamal . the 2 evil sibling and claudia and klaus and overhear the banter between alvin and brittany and decide to use them a the delivery boy and girl for their loot ( more claudia idea than klaus and the latter initially object feel that it too dangerous for child ) . the 2 sibling make an offer to the boy and girl travel via air balloon to 12 drop off point to leave doll ( which resemble the kid ) that contain diamond and or or money to indicate their arrival and with the promise that whoever win the race will get an obscene amount of money . but a the two different set of talk animal sibling make their round and they be stalk by the henchman of jamal but who be jamal . be he friend or foe . overall represent enjoyable and lighthearted farce base on the 1980s tv series version of alvin and the chipmunk . beautiful animation be a highlight and lack the crude humor that keep creep into today family film and engage song ( boy and girl of rock and roll be a stand out ) . eagle eyed fan will probably notice that brittany character design have be tweak from the animated series and give her a less round face while add a seemingly permanent blush to cheek ( which jeanette and eleanor also display ) . keep an ear out for nancy cartwright and the voice of bart simpson .