PHILADELPHIA, PA - JULY 28: Singer Katy Perry performs at the 2016 Democratic National Convention-Day 4 at Wells Fargo Center on July 27, 2016 in Philadelphia, Pennsylvania. (Photo by Earl Gibson III/WireImage)
PHILADELPHIA, PA - JULY 28: Singer Katy Perry performs at the 2016 Democratic National Convention-Day 4 at Wells Fargo Center on July 27, 2016 in Philadelphia, Pennsylvania. (Photo by Earl Gibson III/WireImage)