Online shots have been fired in the feud between Justin Bieber and Patrick Carney.
It all started last weekend, when The Black Keys drummer said Bieber should not worry about his lack of Grammy nominations because the event is based around music, not money.
"And he's making a lot of money. He should be happy."
Translation: Bieber makes crappy music.
Justin then replied that Carney should be slapped for the comment, which has led Carney to make the above change to his Twitter profile.