Pop sensations Alvin, Simon and Theodore end up at care of Dave Seville's Twentysomething nephew Toby. The boys must reserve music stardom to return to faculty, and are tasked with rescuing the institution's music program . But the Chipmunks meet their game three singing chipmunks called The Chipettes - Eleanor, Brittany and Jeanette. Romantic and musical sparks are ignited once the Chipmunks and Chipettes square away.