Review by SnoopyStyle

Dave (Jason Lee) takes the Chipmunks and the Chipettes on a cruise ship. Ian (David Cross) is bitter for losing his job and is now the pelican mascot. Alvin's irresponsible ways get the Chipmunks stranded on a tropical island where they encounter Zoe (Jenny Slate) who has been stranded for 8 or 9 years. Dave and Ian get thrown overboard and washed up on shore.

This is pretty horrible for the first third. The Chipmunks are so fake already. Putting them on cruise ship only adds to the glaring artificially of the whole enterprise. This seems hopeless but the movie adds Jenny Slate to joke about 'Cast Away'. It should be a straight shot to spoof that movie. Zoe could ask the Chipmunks about the world in the last 8 year and they could make up a lot of fun misunderstood news. There are a million ways to add comedy to this but I don't think the writers care. This is strictly for the littlest kids and any real jokes are superfluous.