This January we celebrate National Have Fun at Work Day. (Have you sent out your Have Fun at Work Day cards yet?) In the spirit of this holiday -- whether you realized it was upon us or not -- we're giving you a few celebs who don't need to be reminded to have fun on the job.
Take Tina Fey, for example. You could hardly think she wasn't having fun wearing these oversized Hulk hands. You know, until she hits you.