In the end credits, there is a disclaimer that says 'No chipmunks were harmed during the filming of this movie.'
During the ending credits, there are signs for the memory and dedicated that say "This film is dedicated to Ross Bagdasarian Sr., who was crazy enough to invent three singing chipmunks nearly fifty years ago."
At the beginning of the credits, there is a brief scene in which Ian attempts to get real-life squirrels, sitting atop his piano, to sing.