While celebrities have long been forced to smile for the cameras, no one can be cheerful all the time.
In fact, some stars have become known for mastering moodiness on the red carpet. For example, Victoria Beckham has perfected her passive-aggressive scowl over the years. Kristen Stewart is perpetually the picture of sullen angst. And this summer, U.S. Olympic gymnast McKayla Maroney reacted to a disappointing fall at the women's vault final with a meme-worthy pout that inspired a "McKayla Is Not Impressed" Tumblr. Even Jimmy Fallon wanted to get in on the action, seeking a "b-tch face" tutorial from teen fashion scribe Tavi Gevinson last month.
Below, celebs demonstrate their finest "b-tch face."