Recording artist Katy Perry attends the launch of the Parker Institute for Cancer Immunotherapy, an unprecedented collaboration between the country's leading immunologists and cancer centers on April 13, 2016 in Los Angeles, California.
(April 12, 2016 - Source: Jesse Grant/Getty Images North America) see more angles »
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Katy Perry Pink Nail Polish

Katy Perry's pink nail polish provided a sweet contrast to her edgy black dress.

Katy Perry Metallic Belt

Katy Perry styled her black leather dress with a silver flower belt for the Parker Institute for Cancer Immunotherapy Gala.