We have 10 unique movie posters(16 including variants) for 6 movies featuring Ross Bagdasarian, Jr..
Alvin and the Chipmunks Batmunk 2012
Alvin and the Chipmunks Meet the Wolfman 2000
Alvin and the Chipmunks Meet Frankenstein 1999
Cartoon All-Stars to the Rescue 1990
The Chipmunk Adventure 1987
A Chipmunk Christmas 1981