Fox Home Entertainment’s Alvin and the Chipmunks sold more than 2.6 million copies on Tuesday, becoming the fastest-selling DVD of the year.

The DVD is getting a boost from a “Get Munk’d” mall tour, which averages more than 2,500 fans at each stop. The tour consists of a stage show concert, and will stop at Chicago, Seattle, Minneapolis, San Francisco, Atlanta, St. Louis, San Diego and Salt Lake City.

Alvin and the Chipmunks is also available on Blu-ray.

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