He made Justin's beliebers even angrier than they already were by changing his official Twitter profile pic to one of Bieber. He also changed his profile name to Patrick Bieb Carney, and updated his description to read "official twitter for the actual verified Patrick Bieb Carney. Drummer in the Black Keys."
Carney has since changed his profile picture and name back, but his bio still reads "Patrick Carney (formerly Justin Bieber).
Carney initially attracted the ire of Bieber's 34-million followers last week when he told TMZ that the teen pop star didn't deserve any Grammy nominations. Justin responded by saying that the drummer "should be slapped around," which his fans were only too willing to do via Twitter.
Carney didn't seem to mind much, and has been re-tweeting his favorite insults as they continue to pour in.
Photo Credit Getty Images and Twitter