Alvin and the Chipmunks: Chipwrecked (Blu-ray release 2012-3-27) tells the story of the chipmunks family vacation, in which they are stranded on an island.  I think this movie is average – it may be enjoyed by kids or people who think those chipmunks are cute.  For everyone else, the screenplay is not too interesting as the new character is not fully utilized to improve the story.  I like its references to other movies though.