Alvin and his brothers Simon and Theodore are back! This time, they’re back and need to attend school everyday like any normal kid does. They instantly became everyone’s favorite except for the jocks who hate them for stealing the girls’ attention from them.
On the other hand, the chipmunks’ former manager, Ian, now manages the new female singing group sensation called the ‘Chipettes’ composed of Brittany, Jeanette and Eleanor. Ian, upon learning that there will be an Inter school talent competition and the school is eyeing Alvin and he Chipmunks to be the school’s representative, enrolled the Chipettes to compete against their long-time crushes Alvin, Simon and Theodore.