Deadmau5, real name Joel Zimmerman, performed at Brisbane's Creamfields club on Sunday and went on to attend the afterparty at the city's Birdie Num Num venue.
But Deadmau5 was not a fan of the tunes being played by the event DJ and asked for a change in music.
His request was snubbed, but the unidentified DJ later approached Deadmau5 and reportedly attacked him.
In posts on his Twitter page, the star writes, "Thank God for Creamfields tonight, cause the music at the after party is f**king god awful..."
"Birdee nightclub in Brisbane. Opening DJ came at me later in the night and decided to punch me in the back of the head."