Stefani Germanotta (born Stefani Joanne Angelina Germanotta), who performs under the stage name Lady Gaga, was born on March 28, 1986 at Lenox Hill Hospital in New York City, New York, the eldest child of Joseph and Cynthia (née Bissett) Germanotta. She is mostly of Italian heritage with some French ancestry on her mother's side. She has a younger sister of six years, Natali. Around the age of four, Stefani started to learn piano by ear and after a while, wrote her first song called "Dollar Bills".