SELENA GOMEZ performed at a Christmas concert in L.A. on Friday night . . . but things weren't going well for her.
The sound kept messing up during her set . . . and that was a big deal because Selena was reportedly LIP-SYNCHING. She mentioned the technical difficulties at least once during the show.
Eventually, Selena had enough . . . and after one song shouted, quote, "What the [eff]!" And she did NOT censor herself. She also reportedly "stormed off" the stage early.
It's like a video War of the Roses!
This will be a hard one to explain to the wife...