Alvin and the Chipmunks (2007)

Continuity mistake: When the chipmunks start practicing for the first time with Ian, Ian gives Simon "cooler" glasses that he should use it from now on. However, in their tour shots he's still using his old glasses. Much later in the movie he is also seen rummaging through a desk cabinet for his his old glasses which he found to be already bent. (01:01:50)

Alvin: I feel like P. Diddy with fur.

Trivia: When the Chipmunks are singing their Christmas song with Dave, he is playing a piano. That piano belonged to the creator of the original Chipmunks, Ross Bagdasarian.

Question: In the beginning of the movie, was it really Jason Lee's voice during Dave's song? It sounded really good.