Carney's feud with Bieber started last year after an online tabloid asked the Black Keys star his opinion of the Grammy Awards ignoring Bieber. Carney said at the time, "Grammys are for music, not for the money, and he's making a lot of money. He should be happy."

This led to Bieber joking on Twitter that Carney should be "slapped around." The joke was lost on some of the teen popstar's fans who unloaded death threats and insults on Carney, according to ABC.

In the latest issue of Rolling Stone, Carney was asked about Bieber backlash and said, "Justin Bieber, like a f***ing irresponsible a**hole, sicced 40 million Twitter followers on me because I paid him a compliment he didn't understand. I [was] saying that he should be grateful that he has a f***ng career in music. And he shouldn't be f***ing telling his followers to slap me, and then also be doing anti-bullying bulls**t. It's so irresponsible."

He goes on to say, "Honestly, I feel bad for him...I don't listen to his music, but he needs to not conduct himself that way. Like, really, you make millions of dollars playing music, you should feel f***ing lucky."