The 23-year-old singer surprised the viewers of the recently concluded MTV Video Music Awards 2013 with her "alleged insults" towards British boy band One Direction.

While 1D was presenting the award for Best Pop Video, the newly-engaged Zayn Malik cheerfully said that the "best fans are in New York." With an annoyed look on her face, Swift was unfortunately caught on camera mouthing "Shut the f**ck up."

She was clearly enjoying the night gossiping with fellow singer and newfound best friend Selena Gomez who was seated next to her.

The songwriter's cleavage-baring ensemble did not go to waste for she won the Best Female Video award for her single "I Knew You Were Trouble".

When she received her Moonman onstage, she ended her speech with a seemingly sarcastic acknowledgment:

"I also want to thank the person who inspired this song, who knows exactly who he is, because I got one of these."

Although she did not drop the name, everyone apparently knew who inspired the song. The camera then panned to the 19-year-old British boy bander who merely gave a bemused expression.

Swift is known for immortalizing her former beaus through her heartfelt songs. "Every one of my regrets has produced a song I'm proud of," she previously said in an interview.

Apart from Styles, some of the hit maker's old flames include Taylor Lautner, John Mayer, Jake Gyllenhaal, and the late Cory Monteith.

Fans of the boys are now wondering whether their upcoming movie 1D3D includes a line about the seemingly vengeful performer.