Billie Eilish Pirate Baird O'Connell, born in Los Angeles on December 18, 2001, is a Grammy-winning American singer and songwriter. She gained fame through her collaborations with her brother, Finneas O'Connell, particularly with the viral hit "Ocean Eyes" in 2015. She's known for her unique blend of pop, alternative, and electronic music, and has achieved international recognition with albums like "When We All Fall Asleep, Where Do We Go?" and "Happier Than Ever".