Bagdasarian, Sr. as David Seville (speaking only) and the singing voice for Alvin, Simon and Theodore. Personnel Ross Bagdasarian Jr. — lead guitars and the spoken voice of Dave on track 2 and the sung vocal of Alvin Steve Vining — bass on track 8 and the sung vocal of Simon Janice Karman — the sung vocal of Theodore Jason Lee — spoken voiceover on track 7 (as "David Seville") Justin Long - spoken voiceover on tracks 7 (as "Alvin") Matthew Gray Gubler — spoken voiceover on tracks 7 (as "Simon") Jesse McCartney — spoken voiceover on tracks 7 (as "Theodore") Jason Gleed — guest vocals and rhythm guitars Chris Classic — secondary guest lead vocals Rebecca Jones — tertiary guest lead vocals Ali Dee Theodore — keyboards, bass (except track 8) and drum programming Alana Da Fonseca — uncharacterized backing vocals Joey Katsaros — manipulation of original concept album samples and uncharacterized backing vocals Zach Danziger — live drums and uncharacterized backing vocals Vinny Alfieri — uncharacterized backing vocals Andy Richards — string synthesizer on track 4, piano on track 8 Ross Bagdasarian Sr. — piano on track 15, the singing voice of Dave on track 15, and the spoken voice of Dave, as well as singing voices for Alvin, Simon, and Theodore on track 16 Aaron Sandlofer —keyboards, bass, guitar, drums & uncharacterized backing vocals Charts Score album The film's original score was composed and conducted by Christopher Lennertz, a fan of the Chipmunks since childhood. La-La Land Records released a limited edition album on September 19, 2008. Main Title (1:07) I'm Late (:40) Ever? (2:07) Dave's Theme (:48) No More Nuts/Storing Food for the Winter (4:43) Rescue the Gear/Toaster Waffles (1:44) Leave Me Alone (2:17) I'll Clean Out My Office (1:35) Are You Awake? (1:13) Christmas Morning (4:09) Live with Uncle Ian (2:36) Dinner! (2:07) Dave Remembers/Missing the Boys (1:08) Get Them! (1:03) Dave's Phone Call (1:06) Theodore's Nightmare (1:05) I Want to Go Home (1:28) Alvin!!!/You'll Never Take Us Alive (4:09) Release Marketing The first poster for Alvin and the Chipmunks was revealed online on July 4, 2007. Later that month, Fox launched the official website for Alvin and the Chipmunks with only a trailer and synopsis; Several games were added later on. In an August 2007 survey of 750 American teens ran by eCRUSH and OTX, Alvin and the Chipmunks, alongside Saw IV, National Treasure: