One Direction shocked their audience at a recent concert when they mentioned Taylor Swift while singing the lyrics "I'm in love with you" on Monday night.

Following the band's Little Things performance, audience members heard the pop singer's name. Harry Styles (who broke up with Swift recently) reportedly didn't join in with the supposed prank by his fellow band members.

After the prank 1D member Liam Payne and Niall Horan looked over at Styles, but he didn't look affected by the occurrence. The specific band member who said Swift's name has not been identified.

Swift ended her romance with Styles in January after a two-month relationship, according to Life and Style. The couple's work commitments got in the way of their love life and Swift decided to break up with Styles.

The 22 singer was rumored to have mocked Styles during a performance of hers but the One Direction member had not retaliated, although his band mates supposedly thought on Monday that it was time to get back at her.

After Swift admitted that I Knew You Were Trouble was written about Styles, a source told Hollywood Life that he doesn't care about it.

"He is over Taylor, so whatever she does, is what she does!" the source said. "He isn't even bothering to care about the songs she sings about him. He is over her."

Tags
One Direction, Taylor Swift, Harry Styles