When Alvin , Simon and Theodore are forced to put aside their music superstardom and go back to school, they are given the challenge of saving the school's music department by winning the $25,000 prize in a battle of the bands. But the Chipmunks unexpectedly meet their match in three singing female chipmunks known as The Chipettes: Brittany, Eleanor and Jeanette. Romantic and musical sparks fly in the face off that ensues between The Chipmunks and The Chipettes.