Black Keys' Patrick Carney
After TMZ caught Black Keys' drummer Patrick Carney saying that Bieber shouldn't be upset for not scoring a 2013 Grammy nomination because "Grammys are for music, not for the money, and he's making a lot of money," Bieber unleashed the Beliebers on him via Twitter.
"The black keys drummer should be slapped around haha," he tweeted.
"I mean, Justin Bieber is a f*cking moron," Carney later told Rolling Stone. "And that's the gist of what I was saying. And then he goes and says I should be slapped? Honestly, I feel bad for him."