Selena Gomez reportedly had some trouble during her performance at KIIS FM’s annual Jingle Ball event on Friday, where she dropped the mic and stormed off stage amid a cloud of obscenities.

21-year old Gomez may or may not have been using a backing track during the show when the audio malfunctioned, and a source said it appeared she was lip synching.

“She for sure said ‘what the f–k,’ … You could hear it crystal clear,” the source said. “She was messing around with her ear piece from the first song so you knew something wasn’t right.”

The former girlfriend of Justin Bieber apologized to the crowd for the technical difficulties and promised them a few more songs, but after “Come And Get It”, she stormed off the stage.

“Sorry, the sound isn’t working!” Gomez reportedly told the crowd. “Are you guys having a good night? I promise, a lot cooler people are gonna come out tonight. Is it okay if I perform two more songs and you guys can get to it?”

An audience member told Us Weekly that Gomez was clearly upset during “Come And Get It”.

“She was pissed doing the next song and she said two more songs,” the source said. “[She] didn’t do the last one.”

Image: Wikimedia Commons