Las ardillas más famosas y divertidas del cine regresan a la gran pantalla para protagonizar una nueva aventura. En ella, Alvin y sus compañeros deben enfrentarse a la presión de la escuela, a los problemas de la celebridad y a un grupo de chicas ardilla que les está haciendo la competencia

Pop sensations Alvin, Simon and Theodore end up in the care of Dave Seville's twenty-something nephew Toby. The boys must put aside music super stardom to return to school, and are tasked with saving the school's music program by winning the $25,000 prize in a battle of the bands. But the Chipmunks unexpectedly meet their match in three singing chipmunks known as The Chipettes - Brittany, Eleanor and Jeanette. Romantic and musical sparks are ignited when the Chipmunks and Chipettes square off.