Katy Perry kicked off her Prismatic World Tour in Northern Island May 7, and debuted this video during her concert. Some people said it reminded them of Lady Gaga's SXSW performance when she had a performer vomit on her. I'm giving Katy the benefit of the doubt that she was just trying to entertain and be expressive with the paint- not trying to simulate making oneself throw up. What do you think?