If you didn't make it down to Miami for the Ultra Music Festival from what I hear you missed a hell of a show. One of the highlights was during Deadmau5 set. He was a last minute fill in due to Avicii being hospitalized the day prior.

Turns out Deadmau5 has a little beef with fellow DJ/Producer Martin Garrix. So much that during his (Deadmau5) set, he "trolled" the 17 DJ when he played a very different version of "Animals"

Get the story here and check out some of the tweets Deadmau5 posted here.