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.

• Fox 2000 Pictures
• Bagdasarian Productions
• Zachary Levi
• David Cross
• Jason Lee
• Justin Long
• Matthew Gray Gubler
• Jesse McCartney
• Amy Poehler
• Anna Faris