Cast:
* Justin Long as Alvin (speaking voice)
* Matthew Gray Gubler as Simon (speaking voice)
* Jesse McCartney as Theodore (speaking voice)
* Ross Bagdasarian, Jr. as Alvin (singing voice)
* Steve Vining as Simon (singing voice)
* Janice Karman as Theodore (singing voice)

Director: Betty Thomas
Writers: Jonathan Aibel and Glenn Berger

Release Date: 25 December 2009 (USA)

Plot:
The world famous singing pre-teen chipmunk trio return to contend with the pressures of school, celebrity, and a rival female music group known as The Chipettes.

Links:
Official Website
IMDb