Pop sensations Alvin, Simon and Theodore end up in the care of Dave Sevilles twenty-something nephew Toby. The boys must put aside music super stardom to return to school, and are tasked with saving the schools 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.
Zachary Levi, David Cross, Justin Long, Matthew Gray Gubler, Jesse McCartney, Amy Poehler, Christina Applegate