Taylor Swift has a well-documented passion for dancing at awards shows, so it's no surprise that she was bouncing along to performances at the Grammy Awards Sunday night.

But her signature dance moves didn't appear to impress Pharrell Williams, who bested the 25-year-old singer in the Best Pop Solo Performance category.

In a Vine that went viral after the ceremony, Williams casts several bewildered and amused glances over in Swift's direction.