Alvin and the Chipmunks font here refers to the font used in the poster of Alvin and the Chipmunks, which is a 2007 American comedy movie based on the characters of the same name created by Ross Bagdasarian, Sr.
The font used for the movie title in the poster is probably Gill Sans Extra Bold designed by Eric Gill in 1931. The font is a commercial one and you can view more details about it here.
Download Gill Sans Font
The Gill Sans font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel as well as round-ups of new & fresh fonts around the web.