It's simple. Post a picture and caption it. Don't be shady or pressed, it's all in the name of good fun
For example:
Gaga: So then in the middle of the video R. Kelly grinds on me and nuts on my chest with a special ARTPOP sauce and at the end of it I become pregnant
Katy: Eww Stefani sis not gonna lie, that’s a lil bit nasty lol
Gaga: Um excuse me didn't you date Riff Raff or s/t like that
Katy:....
Gaga:....
Katy:...
