Billie Eilish Pirate Baird O'Connell is an American singer-songwriter who rose to fame in the mid-2010s. She became widely recognized after releasing her debut single "Ocean Eyes" in 2015, a track that was both written and produced by her brother, Finneas O'Connell. Her debut EP, Don't Smile at Me, came out in 2017 and achieved commercial success in several countries, including the United States, the United Kingdom, and Australia. Eilish is known for her unique musical style and has become a significant figure in pop culture during the 2020s.