Because this story is similar to Donald Duck vs. Chip and Dale, it should be known as David and the Chipmunks or Dave vs. the Chipmunks.
Dave (Jason Lee) works his way through a script with little imagination by Jon Vitti and Will McRobb doing most of his work to non-entities - the Chipmunks are CGI filled in during post production.
Dave, an advertising guy, dreams of witting songs so much so that his girlfriend, Claire (Cameron Richardson) believes he is too immature to keep dating. How his problems are acerbated and solved, flows through the energy and cuteness of the three Chipmunks: Alvin, voiced by Justin Long, Simon, voiced by Matthew Gray Gubler and Theodore, voiced by Jesse McCartney.
The story is well known, the Chipmunks give Dave grief but their singing brings fame and wealth. Before that progress is reached the Chipmunks, lead by Alvin, trash Dave's house a number of times, settling in near the Lucky Charms and cheese balls. But, singing in the rain by the three catches Dave's ear and he quickly bangs out "The Chipmunk Song" and it takes off on the charts.
Then we are forced to suffer through a silly plot device in which Ian (David Cross) head of Jett records grabs control of the fuzzy little friends and they are forced to sing for their supper and live in a cage. Will Dave and Claire save their little friends? Of course and the Christmas song fills the sound track before and after the little fuzzes do some rock numbers in stadiums which make Ian very rich.
The lacking script is somewhat overcome by the CGI Chipmunks particularly Theodore who becomes cuter as he becomes rounder and rounder while consuming multiple deserts.
The only film for kids out this Christmas season would have worked better with a simple script based on the original song with the Chipmunks causing consternation for Dave in the ordinary functions of life.