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E! Loves VMAs GIFs

Apparently, Taylor Swift's fierce musings aren't confined to just her songs' lyrics.

The singer appeared to throw some shade at her ex Harry Styles and his band, One Direction, when she seemingly unleashed a potty-mouthed zinger Sunday night at the MTV Video Music Awards while the boy banders took the stage.

And it was all caught on camera.

One Direction, Taylor Swift

yourtube

Sitting with pal Selena Gomez, the 23-year-old Swift was watching One Direction from the audience when she appeared to mouth the words "Shut the f--k up."

Chalk it up to yet another watercooler moment from the singer at the VMAs: Earlier in the night, while accepting the award for Best Female Video for "I Knew You Were Trouble," Swift gave a shout-out to "who I wrote this song about cause you know who you are and now I have this award."

The camera then cut to Styles, who smirked as he kept chewing his gum.

(Not quite the stellar night for the 1D boys: At one point, they were briefly booed while accepting their Moonman for Song of the Summer, for "Best Song Ever.")

MTV Video Music Awards, Niall Horan, Louis Tomlinson, Liam Payne, Zayn Malick, Harry Styles of One Direction

Jamie McCarthy/Getty Images for MTV

Then again, Styles seems to have resigned himself to the fact that he—along with any other guy Swift has dated—will always be fodder for savory musical material.

During an interview with Us Weekly, the 19-year-old Styles said, "It would be hypocritical for me to say she couldn't do it because everybody writes songs based on personal experience."

But he did give props where they were due: "At least she's a great songwriter!"