Underwood, 30, who has been married to the hockey player for three years, posted a video which showed she and her husband in their car, reported People magazine.
"Mikey, show me your hand," she told her husband.
He held up his right hand, showing off two red bite marks. "Newfound respect for the mighty chipmunk," he said.
The chipmunk, which had entered their house, is now back outside where it belongs.
"The chipmunk is back outside," she posted.