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", "Firework", and collaborations with artists like Timbaland. She is known for her colorful and quirky style when it comes to clothes and performances. Her musical influences include artists like Joan Jett, Madonna, and Cyndi Lauper. She plays the piano and guitar and sings in genres like pop, dance, and electropop.