Alvin and the Chipmunks: The Road Chip TV SPOT - Fast and Furriest (2015) - Animation HD

Through a series of misunderstandings, Alvin (Justin Long), Simon (Matthew Gray Gubler) and Theodore (Jesse McCartney) come to believe that Dave (Jason Lee) is going to propose to his new girlfriend in 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.