Justin Bieber really doesn't care about the "F-bomb" that Selena Gomez dropped at the Jingle Bell Ball in Los Angeles. The media is reporting that the Bieb has no sympathy for Selena in this. Gomez walked off stage after being caught lip-syncing.

Selena Gomez dropped a loud "F-bomb" on the audience while she was performing at the KISS FM Jingle Ball this weekend. Selena was having technical difficulties during her performance. Gomez's mic cut out, but not entirely. Not when she was frustrated, pulled of her ear-piece and yelled the curse heard round the stadium.

But for Selena Gomez's boyfriend, that was no big deal. The former Disney starlet won't be getting any sympathy from Justin Bieber. Insiders say the Bieb "doesn't care" about the backlash.

Selena Gomez and Justin Bieber broke up last December after being in a relationship for two years. But one can't do anything without the world wondering what the other one thinks. Besides Gomez and Bieber are still close. An insider said Bieber isn't worried if Gomez gets a controversy of her own.

The source told HollywoodLife: "Justin is always attacked for what he does, so he knows that it will happen to everyone else, especially Selena. He has heard about it but hasn't seen it, but also doesn't care."

Selena Gomez wasn't at her best at the Jingle Bell Ball in Los Angeles. It wasn't just the cursing. Selena was also caught lip-synching. Us Weekly says Gomez allegedly cut her show short.

When the mic was going in and out someone was filming and put a clip on youtube. It caught Selena saying "what the f**k?" before apologizing with "Sorry, the sound isn't working! 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?"

Before cutting the show short, Selena told the audience at the Jingle Ball  "I have to thank you guys so much for allowing me to be able to perform the music that I love. "And I have to say that before you guys go on to the people that you care about, I really appreciate you supporting everything that I do. So this next song is the first song I had hit No. 1, and it's called Come & Get It."

But that was it, she promised another song but never got to it.