Last night I went and saw Alvin and the Chipmunks: The Squeakquel. I would suggest seeing it if you enjoyed the first movie.
I did not have a clue what this sequel would entail, except the Chipettes. But I liked it. The plot is decent, funny, it has enjoyable music, and the addition of the Chipettes is awesome. Plus, I think the chipmunks are adorable. My favorite is Theodore because of his personality and chubby cheeks.