During tonight’s Grammy Awards, Taylor Swift opened with a performance of “We Are Never Ever Getting Back Together.”

At one point, Swift seemingly mocked her ex-boyfriend Harry Styles.

Swift put on her best British accent, which viewers immediately took to think was some shade towards Styles.

One Direction fans took to Tumblr and Twitter to throw shade right back at the pop superstar. Meanwhile, Swifties were big fans of the low blow.

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See a complete list of 2013 Grammy winners