ST. PAUL, MN JULY 26: Katy Perry performs at the 2015 Starkey Hearing Foundation So The World May Hear Gala at the St. Paul RiverCentre on July 26, 2015 in St. Paul, Minnesota.(Photo by: Adam Bettcher/Getty Images for the Starkey Hearing Foundation)
ST. PAUL, MN JULY 26: Katy Perry performs at the 2015 Starkey Hearing Foundation So The World May Hear Gala at the St. Paul RiverCentre on July 26, 2015 in St. Paul, Minnesota.(Photo by: Adam Bettcher/Getty Images for the Starkey Hearing Foundation)