Sean Parker And The Parker Foundation Launch The Parker Institute For Cancer Immunotherapy Gala - Arrivals [Getty Images]

LOS ANGELES, CA - APRIL 13: Katy Perry arrives at the Sean Parker And The Parker Foundation Launch The Parker Institute For Cancer Immunotherapy Gala on April 13, 2016 in Los Angeles, California. (Photo by Steve Granitz/WireImage)

WireImage Steve Granitz