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.

Starring:

Matthew Gray Gubler, Jason Lee, Jesse McCartney, Justin Long

Genre:

Animation, Adventure, Comedy, Music, Fantasy, Family