The celebrity blogger has been posting naked photos of the singer and has been taking advantage of opportunities to cut her down.
For Gaga's part, she has taken a step back and is no longer engaging the argument--at least not publicly.
Perez has been active in anti-bullying campaigns, which some are saying is a little hypocritical because it looks a lot like he's bullying Gaga right now.
Comedienne Kathy Griffin pointed out the contradiction, tweeting, "Is @PerezHilton cyber bullying & trying 2 RUIN @LadyGaga (whos a FIERCE advocate 4 #LGBT rights) BC she doesnt wanna hang out w him anymore?"
The blogger immediately tried to defend his actions, tweeting:
Do you think Perez is bullying Gaga?