I'm A Mouse Duh Mean Girls T-Shirt Size:5XL " The back of the

" The back of the shirt shows Arnold Schwarzenegger on the movie poster

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I'm A Mouse Duh Mean Girls T-Shirt Size:5XL " The back of theThis Mean Girls t shirt shows Karen Smith wearing mouse ears for Halloween. The shirt reads I'm A Mouse Duh! In Mean Girls, Karen Smith is a member of a group of girls called the Plastics at North Shore High School. Karen is described at school as "dumbest girl you'll ever meet." On Halloween, Karen put on a pair of mouse ears, and when asked what she was supposed to be, she replied, "I'm a mouse, duh!" Everyone will know you are a fan of the 2004