'its just poking fun' what the fuck kind of little monsters are you people? that's where all bullying starts, don't 'poke fun' at people, there's nothing wrong with Katy. Lady Gaga's message is to be compassionate and free yourself from scrutiny, like what you like and ignore everything else, your much happier that way.
I don't see a problem in poking fun at other artists, it's normal. It's not hate, hate is a strong word and a strong feeling. It's called sarcasm and joking around, it's not true hate