You asked:

is katy perry the daughter of steve perry

No. Katy Perry is not a daughter of Steve Perry.
Katy Perry
Katy Perry

Katy Perry (born Katheryn Hudson on October 25, 1984), the American singer-songwriter, and occasional actress

Steve Perry
Steve Perry

Stephen Ray Perry (born January 22, 1949), the American singer and songwriter best known as the lead vocalist of the rock band Journey

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