Flint Lockwood now works at The Live Corp Company for his idol Chester V. But he's forced to leave his post when he learns that his most infamous machine is still operational and is churning out menacing food-animal hybrids.
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.
Matthew Gray Gubler
Playing around while aboard a cruise ship, the Chipmunks and Chipettes accidentally go overboard and end up marooned in a tropical paradise. They discover their new turf is not as deserted as it seems.
When a real estate development invades his Arctic home, Norm and his three lemming friends head to New York City, where Norm becomes the mascot of the corporation in an attempt to bring it down from the inside and protect his homeland.