Alvin is crushed when he finds out that Captain Chipmunk has asked Brittany to the Valentine's Day dance and she accepted.

Chipmunk singing sensations Alvin, Simon, and Theodore are back for an encore in this hilarious 'squeakquel' packed with more action and more nutty fun for the whole family. When a concert mishap lands Dave in the hospital, the Chipmunks take a break from superstardom and enroll in school to fit in with kids their age. But they soon face some stiff competition when they meet the Chipettes, a beautiful, talented trio of chipmunks. La ardilla listada...

Through a series of misunderstandings, Alvin, Simon, and Theodore come to believe that Dave is going to propose to his new girlfriend in Miami, and dump them. They have three days to get to him and stop the proposal, saving themselves not only from losing Dave but possibly from gaining a terrible stepbrother.

A pair of feisty chipmunks solve crimes that police find too small to handle.