Katy Perry is an American singer and songwriter. She was born in 1984 in California. Some of her famous songs include "I Kissed a Girl", "Teenage Dream", "California Gurls", and "Firework". She is known for her colorful and quirky style of dress that often features themes from childhood like lollipops and bears. Perry cites influences like Joan Jett, Madonna, and Cyndi Lauper. She plays piano and guitar and sings in styles like pop, rock, and dance-pop.