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.

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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.