A serious face is often deemed professional-even the dictionary associates unsmiling with being businesslike. It's why hopeful new hires may tap into their inner Victoria Beckham or Kanye West-who famously scowl or pout-when they want to look like they mean business. But actually having a poker or somber face in a job interview may be a less successful strategy to landing a role than flashing potential bosses a big, cheesy grin. That's because, according to new research, a smile exudes confidence and consequently, makes you more hirable.