This girl is obviously a big of ferrets, which is why she has one... on her head? What's even more interesting in this photo is that she walking around in a supermarket, meaning some of the employees must have been terrified at the sight. Perhaps she didn't want to troll the people that were there, but had to go for some last-minute grocery shopping, and had to take her pet with her - after all, people can keep ferrets, just as they can keep dogs.
Interestingly, it some countries there are laws against keeping rats, ferrets and other small mammals. The laws are usually against the domestication of rodents, as when escaped they can cause damage to the human environment (and can be deadly in food processing plants), but some people have a misconception that weasels (which ferrets are a part of) are rodents - but that is not the case.