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.
Elenco: Zachary Levi , David Cross , Jason Lee , Justin Long , Matthew Gray Gubler , Jesse McCartney , Amy Poehler , Anna Faris , Christina Applegate , Wendie Malick , Anjelah N. Johnson , Kathryn Joosten , Kevin G. Schmidt , Chris Warren , Jr. , Bridgit Mendler , Brittany Anne Pirtle .