“One day on this island and we’ve become animals!” The psychology of the Chipmunks can be intriguing. In addition to Alvin’s evident personality disorder, Simon suffers messianic delusions ...

At this point, it's almost impressive (but really just kind of sad) that Alvin and the Chipmunks is on its fourth live-action/CG movie. Seriously, just let that sink in for a second: four movies.

PG for some mild rude humor. “Alvin and the Chipmunks: The Squeakquel” offers exactly two big laughs for its kiddo target audience — one involves passing gas, the other a shot to the crotch.